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Topic Title: Undervolting
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Created On: 01/18/2009 03:00 AM
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 Undervolting   - PCMIKE09 - 01/18/2009 03:00 AM  
 Undervolting   - monte84 - 01/18/2009 03:04 AM  
 Undervolting   - PCMIKE09 - 01/18/2009 03:14 AM  
 Undervolting   - monte84 - 01/18/2009 04:21 AM  
 Undervolting   - PCMIKE09 - 01/18/2009 04:08 PM  
 Undervolting   - monte84 - 01/18/2009 04:15 PM  
 Undervolting   - weinter - 01/20/2009 11:16 PM  
 Undervolting   - PorscheRacer14 - 01/20/2009 11:42 PM  
 Undervolting   - SH - 01/18/2009 04:15 PM  
 Undervolting   - PCMIKE09 - 01/18/2009 04:17 PM  
 Undervolting   - AMD-4-LIFE - 01/18/2009 06:28 PM  
 Undervolting   - SH - 01/18/2009 08:43 PM  
 Undervolting   - PCMIKE09 - 01/18/2009 10:39 PM  
 Undervolting   - Heffy - 01/20/2009 09:51 PM  
 Undervolting   - billbartuska - 01/23/2009 06:04 AM  
 Undervolting   - PCMIKE09 - 01/20/2009 09:54 PM  
 Undervolting   - Heffy - 01/20/2009 10:01 PM  
 Undervolting   - PCMIKE09 - 01/20/2009 10:09 PM  
 Undervolting   - Decembermouse - 01/21/2009 12:09 AM  
 Undervolting   - PorscheRacer14 - 01/21/2009 12:53 AM  
 Undervolting   - PCMIKE09 - 01/21/2009 03:29 PM  
 Undervolting   - Immortal Lobster - 01/21/2009 03:53 PM  
 Undervolting   - PorscheRacer14 - 01/21/2009 04:09 PM  
 Undervolting   - MU_Engineer - 01/28/2009 11:31 AM  
 Undervolting   - PCMIKE09 - 01/21/2009 04:10 PM  
 Undervolting   - Immortal Lobster - 01/21/2009 04:12 PM  
 Undervolting   - PCMIKE09 - 01/21/2009 04:19 PM  
 Undervolting   - Immortal Lobster - 01/21/2009 04:20 PM  
 Undervolting   - PCMIKE09 - 01/21/2009 04:21 PM  
 Undervolting   - Immortal Lobster - 01/21/2009 04:24 PM  
 Undervolting   - PCMIKE09 - 01/21/2009 04:37 PM  
 Undervolting   - Immortal Lobster - 01/21/2009 04:44 PM  
 Undervolting   - PCMIKE09 - 01/21/2009 04:51 PM  
 Undervolting   - Immortal Lobster - 01/21/2009 05:14 PM  
 Undervolting   - PorscheRacer14 - 01/21/2009 06:01 PM  
 Undervolting   - PCMIKE09 - 01/21/2009 06:27 PM  
 Undervolting   - PorscheRacer14 - 01/21/2009 07:07 PM  
 Undervolting   - PorscheRacer14 - 01/21/2009 11:06 PM  
 Undervolting   - PCMIKE09 - 01/21/2009 11:08 PM  
 Undervolting   - PorscheRacer14 - 01/22/2009 02:06 AM  
 Undervolting   - PCMIKE09 - 01/22/2009 07:23 PM  
 Undervolting   - PorscheRacer14 - 01/22/2009 08:27 PM  
 Undervolting   - PCMIKE09 - 01/22/2009 11:28 PM  
 Undervolting   - PorscheRacer14 - 01/22/2009 11:42 PM  
 Undervolting   - PCMIKE09 - 01/23/2009 12:19 AM  
 Undervolting   - PCMIKE09 - 01/23/2009 12:29 AM  
 Undervolting   - PorscheRacer14 - 01/23/2009 01:36 AM  
 Undervolting   - PCMIKE09 - 01/23/2009 03:27 PM  
 Undervolting   - PorscheRacer14 - 01/23/2009 03:37 PM  
 Undervolting   - PCMIKE09 - 01/23/2009 04:04 PM  
 Undervolting   - PorscheRacer14 - 01/23/2009 07:06 PM  
 Undervolting   - PCMIKE09 - 01/23/2009 07:38 PM  
 Undervolting   - PorscheRacer14 - 01/23/2009 07:50 PM  
 Undervolting   - PCMIKE09 - 01/23/2009 08:03 PM  
 Undervolting   - PorscheRacer14 - 01/23/2009 08:51 PM  
 Undervolting   - Jessie James 59 - 01/24/2009 04:02 AM  
 Undervolting   - PCMIKE09 - 01/24/2009 04:44 PM  
 Undervolting   - PorscheRacer14 - 01/24/2009 05:41 PM  
 Undervolting   - PCMIKE09 - 01/25/2009 12:30 AM  
 Undervolting   - Jessie James 59 - 01/25/2009 03:18 AM  
 Undervolting   - Moomanerism2 - 01/25/2009 09:29 AM  
 Undervolting   - PCMIKE09 - 01/25/2009 04:05 PM  
 Undervolting   - Jessie James 59 - 01/26/2009 12:07 AM  
 Undervolting   - Mime - 01/26/2009 03:34 AM  
 Undervolting   - PCMIKE09 - 01/26/2009 04:16 PM  
 Undervolting   - MU_Engineer - 01/28/2009 11:41 AM  
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 01/18/2009 03:00 AM
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PCMIKE09
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Will undervolting cause me to loose performance.

http://forum.notebookreview.com/showthread.php?t=235824

According to this undervolting makes it run cooler with no performance loss.
Is this true?

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 01/18/2009 03:04 AM
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monte84
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Yea, no performance loss, so long as its stable.

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 01/18/2009 03:14 AM
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PCMIKE09
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Oh that is pretty cool I'm going to try it when I get time.
Theres an option, locking cpu at full throttle. Okay is that like overclocking and will that harm my cpu.

Anybody who has underclocked please share thier expirences with me.

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 01/18/2009 04:21 AM
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monte84
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If your trying to find the lowest useable, stable, voltage treat as you were overclocking, take your voltage down a hair let it run something like orthos/prime with multi core support try it for a few hours if it does ok, try a bit lower voltage.

-------------------------
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 01/18/2009 04:08 PM
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PCMIKE09
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So if there is no performance decrease how come you guys don't do it.

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 01/18/2009 04:15 PM
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monte84
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because im overclocked and im running at the lowest voltage its stable at. As for others, perhaps its just to time consuming.

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 01/20/2009 11:16 PM
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weinter
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Originally posted by: monte84

because im overclocked [IMG][/IMG] and im running at the lowest voltage its stable at. As for others, perhaps its just to time consuming.


The default voltage setting is factory determined by AMD and it is the Average Voltage for Stable operating of all the chips with certain level of deviation
So for individual chips the ability to undervolt more is still possible
AMD do not test individual chip lowest voltage capability too tedious and makes it expensive

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 01/20/2009 11:42 PM
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PorscheRacer14
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yeah, every CPU is different. I have one of the rare gems of FX-60's that overclocks and undervolts like mad. I've been overclocked to 2.8GHz and undervolted to 1.31 volts and never had a hiccup at all. Now, the 4200+ I had in before this needed voltage as soon as I went near 207MHz reference clocks.

Undervolting and overclocking both require the same amount of time and testing. Personally, the most I would go is .05 volts with your laptop CPU. Laptop CPUs are already low voltage, and going too low can damage the gates just as putting too much voltage can damage them. Then again, every CPU and setup is different.

Cleaning your fans out will also help in reducing voltage. The cooler the CPU runs, the less voltage it will use or require.

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 01/18/2009 04:15 PM
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SH
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I' ve undervolted my 5200+ from 1.325 to 1.2 v, I think I can go furhter but it is stable as it is and I'm happy with it. I did it to lower my temps, which went from 75ºC to 60ºC full load. Pay attention to stability, since it's the only thing that can be affected. As monte84 said, lower the voltage a bit and test for stability, if you reach a point in which the system is unstable, raise the voltage again and test further for stability (more time).
 01/18/2009 04:17 PM
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PCMIKE09
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SH, but do you loose performance on gaming?

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 01/18/2009 06:28 PM
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AMD-4-LIFE
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Just remember to turn your bathroom lights off and there will be no need to undervolt!!

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 01/18/2009 08:43 PM
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SH
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Nope, the same performance, since the frequency remains the same.
 01/18/2009 10:39 PM
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PCMIKE09
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So this is good.
undervolting=same performance= cooler temperatures

Sweeeeeet.
Anybody successfully Underclock. If you have time can you post on how you did it,

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 01/20/2009 09:51 PM
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Heffy
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I've undervolted mine (6400+ at 1,25V) with Ai Booster, which came with the motherboard. Unfortunately, it's made by ASUS for ASUS motherboards, so - not for everyone.

Of course you have other software, such as RMClock (which is free, by the way). You can download it from here :

http://cpu.rightmark.org/products/rmclock.shtml

Also, some BIOSes allow you to change the voltage directly.

If you want a nice guide on "how-to-do-it-yourself", here's one:

http://www.clunk.org.uk/forums...g-your-processor.html

As to underclocking, it's done with the same tools (AiBooster, for example) or directly from the BIOS. You can do it by reducing either the multiplier or the FSB speed. Personally, I'd recommend changing the first one.
Of course, by doing this, you'll loose performance. I did it during the summer, when the thermometer went a bit too high. It didn't lower the CPU's temperature a lot, but at least prevented it from crossing the red line...
 01/23/2009 06:04 AM
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billbartuska
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Originally posted by: PCMIKE09

So this is good.

undervolting=same performance= cooler temperatures



Sweeeeeet.

Anybody successfully Underclock. If you have time can you post on how you did it,


I think you're confusing undervolting and underclocking.
Undervolting a PU is running it at a voltage that is lower than stock.
Undervolting causes no performance hit.
Underclocking a CPU is running it at a speed that is lower than stock.
Under clocking causes a performance hit. The size if the hit depends on how much you underclock.

If you BIOS supports adjusting CPU, memory, NB, SB, etc voltages, then you can try undervolting. If your BIOS supports changing FSB/multipliers, then you can try underclocking.

Some surprising results are available with combining underclocking with undervolting.

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 01/20/2009 09:54 PM
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PCMIKE09
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Since I play games can I just leave a profile for gaming, and a profile for well the undervolt when I dont play games.

According to the article performance is not decreased.

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Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
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 01/20/2009 10:01 PM
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Heffy
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Well, AiGear does what you're mentioning (it has to be done manually, each time, though). But once again - ASUS. I haven't inquired yet for an alternative, since I don't use it.
 01/20/2009 10:09 PM
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PCMIKE09
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lol, Iam using a laptop and I have a 'dell motherboard'
When I get the time I'm going to try to underclock my two laptops.

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Dell Studio 15 Hp dv6000
Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
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 01/21/2009 12:09 AM
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Decembermouse
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I would be surprised to find a laptop motherboard that let you undervolt or overclock.

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Check it out.
 01/21/2009 12:53 AM
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PorscheRacer14
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True, and those windows utilities that try to do that aren't reliable.

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 01/21/2009 03:29 PM
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PCMIKE09
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Porsche
I dont have the options in my bios nor do I think standard laptops have.
I will try to undervolt with rm clock. And what do you mean it will damage gates. Gates?
And wouldn't this prolong the life. Lower voltage equals lower temp which equals less usage which should equal longer life expectancy.
Whats the average life of a laptop.

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 01/21/2009 03:53 PM
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Immortal Lobster
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When you ndervolt, your doing the same thing as overclocking, trying to maximize da megahurts while minimizing the volts, this causes instability. The instability is what will kill the CPU, as it tries to work on not enough juice. The only problem with overvolting is heat dissipation, in most cases, certain CPUs are built to dissipate so much heat, it's only when you go above those levels that makes overvolting so dangerous, but the proper cooling, lapping, removal of the IHS, etc can mitigate that danger, albeit imposing their own.

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 01/21/2009 04:09 PM
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PorscheRacer14
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the gates are the tiney electrical switches in the transistor that make the CPU do the stuff and magic we like. They are also what we refer to in size when we say a chip is 45nm or 65nm. Not every part of the CPU 45nm, but the electrical gates woud be when we mention manufacturing process.

Average life of a laptop is a year due to the abuse they take and the way they are designed and their performance. I do have my dad's 386SX notebook though and despite going down the stairs a few times and just plain stupid things we've done to it, it still lives on and works the same as when it left the manufacturer.

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 01/28/2009 11:31 AM
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MU_Engineer
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Originally posted by: Decembermouse

I would be surprised to find a laptop motherboard that let you undervolt or overclock.


Overclocking a laptop is rare since most of them have pretty marginal cooling at stock speeds and voltages, but it is easy to undervolt a laptop. You just adjust the Cool 'n Quiet or SpeedStep voltage-to-frequency mappings to reduce the voltages for each individual frequency step. This works for K8s, K10s, and Core 2-based desktop and server processors as well. You need a program like RMclock for AMD and Intel CPUs on Windows or LinuxPHC (Intel processors on Linux) or cpupw (AMD processors on Linux) to do that task. Note that you cannot drop the Vcore for the idle speed on AMD desktop processors or any Intel CPUs, although you can generally drop the idle voltage on AMD mobile chips down to a certain point- I think my wife's Sempron 3600+ can have a Vcore down to about 560 mV.

And about underclocking- that's what Cool 'n Quiet or SpeedStep are for if you have a K8, K10, ore Core 2. Most boards do not let you drop the Vcore lower than the default Vcore at full speed in BIOS. But you do get significant Vcore drops with CnQ/EIST. Underclocking isn't really of much use without undervolting as heat production in related to the square of voltage and only linearly with clock speed. Every K8 board I've seen does not let you drop HT link speed below 200 MHz and K8s have a minimum 4x multiplier, so at best you can get 800 MHz as your underclocked speed, but at full-speed Vcore. Idle on K8s is 1000 MHz and usually 1.100 volts, so you're best off just leaving CnQ on. The only situations where underclocking in the BIOS would be of use are if you have a chip that runs at full speed all of the time, such as non-mobile K7s, PIIIs, and most P4s.

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 01/21/2009 04:10 PM
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PCMIKE09
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Wait overvolting is the same as undervolting? lol I mean is undervolting dangeorous as overvolting?

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 01/21/2009 04:12 PM
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Immortal Lobster
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Yes, for the reasons I gave, your still stressing the CPU beyond it's designed parameters. your just overclocking in reverse.

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 01/21/2009 04:19 PM
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PCMIKE09
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I still have my hp from 05 and it still works as day 1.
Also I have my deskstop from 01 and 8 years later still works as day 1. beside 1 hard drive failed.

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Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
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 01/21/2009 04:20 PM
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Immortal Lobster
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You ever undervolt those?

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 01/21/2009 04:21 PM
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PCMIKE09
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Nope. Gonna try and undervolt the hp when i get the time.

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 01/21/2009 04:24 PM
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Immortal Lobster
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I'm still utterly curiosu as to why?

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 01/21/2009 04:37 PM
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PCMIKE09
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curious about?

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 01/21/2009 04:44 PM
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Immortal Lobster
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why you want to undervolt it.

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 01/21/2009 04:51 PM
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PCMIKE09
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1. my hp runs way too hot, and its good longer battery life with the same performance

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Dell Studio 15 Hp dv6000
Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
3gb 800mhz ram 2gb 667mhz ram
Ati Mobility Radeon hd 3450 256mb Nvidia geforce go 6150
 01/21/2009 05:14 PM
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Immortal Lobster
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You might gain 5 minutes, and all laptops run hot, that's what happens when you cram a lot of electrical circuits into a very tight box.

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 01/21/2009 06:01 PM
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PorscheRacer14
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Like I mentioned before, your best bet is to make sure all the vents are clean and the copper heatsink fnis are clear of dust and debris. You might need tweezers, a cue-tip and rubbing alcohol to get it all out and maybe even take some access covers off and maybe even take the chassis apart. I did that to my HP laptop a few months ago and it performs like new again. And trust me, my laptop runs way hotter than yours and geets much worse battery life. I've seen the CPU report as high as 83C and when brand new I would struggle to get an hour out of it.

If you want performance in a laptop, you're almost always going to have to sacrifice battery life. The only other alternative is to get a tiny screen that doesn't use much power, but then you wouldn't need a powerful laptop in the first place.

If your laptop gets, let's say an hour and a half tops with everything on aggressive power savings and screen dimmed down, undervolting is maybe only going to give you a few more minutes. The volts don't really draw the power, it's the wattage of your CPU and devices that draw the power.

A quick example would be incadescent light bulbs and compact flourescent lights. Sorry folks, but I'm going to use north american ratings here. They both operate at 120 volts, but the CFs use much less wattage, and of course, watts = heat so they produce minimal heat, last longer and all that goodness. But, if you want a bulb with a million candle rating, you're going to have to go old school and get a bulb that sucks back the power.

(I was going to use use a car anaology but I decided to mix it up this time.)

*I did manage to find a good undervolting guide if you do wish to go that way though.

http://forum.notebookreview.com/showthread.php?t=235824

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Edited: 01/21/2009 at 06:10 PM by PorscheRacer14
 01/21/2009 06:27 PM
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PCMIKE09
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Its not only battery life its to reduce the heat. Maybe you should try it with your hp laptop.

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Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
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 01/21/2009 07:07 PM
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PorscheRacer14
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Well, my old Prescott onlyhas two speed steps, 2.8GHz and 3.4GHz so it's not going to make much of a difference. The old Pentium 4s need to be clocked up anyways to make the Hyper-Threading effective.

I took my laptop apart and cleaned it out thouroughly. I also lapped the CPU heatsink and GPU heatsink, and applied some high-performance thermal compound to the CPU, chipset and GPU. That alone saved me about 10C and then I modified my cooling setup for the laptop and not the fans hardly kick in. Even when stress testing it it doesn't go over 65C which is pretty good for most laptops and stellar for this one.

BTW, what kind and amount of laptop RAM do you have? I need 2x1GB of DDR2 533MHz RAM for my laptop, but 667 will work if it has speed settings to go down to 533 at 4-4-4-12 timings.

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 01/21/2009 11:06 PM
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PorscheRacer14
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This is will save me some typing and explains it straightforward.

http://forums.techpowerup.com/showthread.php?t=6859

Good RAM can make the difference and provide overclocking headroom. That's why I got my RAM. It may be DDR, but I have it running at 500MHz with 3-3-2-8 CR1 timings... and it's not even overclocked

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 01/21/2009 11:08 PM
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PCMIKE09
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Is that your laptop ram and how did u get it that low?

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 01/22/2009 02:06 AM
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PorscheRacer14
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Because it's old DDR RAM and they run slower, but have tighter timings. When I was at the normal 400MHz that socket 939 CPUs support, I would run it at 2.5-3-2-8 timings. Then again, socket 939 was the bomb back in the day. DDR stayed on longer than it normally would have becasue AMD was kicking Intel around, so memory manufacturers actually stepped up to the plate and started making some really good ICs. I also spent $250 for 2GB of RAM. It was the best of the best though and I have more bandwidth and lower latency than most AM2 setups out there.

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 01/22/2009 07:23 PM
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PCMIKE09
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How would i check my ram timmings since it is the ram dell gave me.

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3gb 800mhz ram 2gb 667mhz ram
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 01/22/2009 08:27 PM
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PorscheRacer14
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3 easy ways:

1. Download and run CPU-Z and click the memory tab
2. Download and run Everest Ultimate and run the Cache and Memory benchmark
3. Open your RAM access cover and read the label on your RAM (they usually have a sticker, but you might have to read the fine print on the module)

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 01/22/2009 11:28 PM
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PCMIKE09
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i have 6-6-6-18 is that good?

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 01/22/2009 11:42 PM
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PorscheRacer14
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For laptop RAM, that is average. I'm guessing that is your DDR2 PC6400 (800MHz) RAM?? I just looked up some generic Kingston RAM at 800MHz that I can get here in Canada and it has 5-5-5-18 timings and these are 2GB modules. Yours is probably the earlier stuff where they sacrificed timings for speed. Still, $39.99 for 2GB with good timings is a great deal.

That's probably as good as you're going to get for laptop memory. There's more selection in desktop memory and since most desktop motherboards can run the memory at more voltage you can find even 1066MHz RAM with 5-5-5-15 timings. With a laptop you're stuck at the JDEC spec for voltage. For DDR it's 2.6 volts, for DDR2 it's 1.8 volts and DDR3 is 1.5 volts IIRC.

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 01/23/2009 12:19 AM
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PCMIKE09
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What happens if I put 1066mhz in my computer. How do I know if my motherboard will support it. Wait is 1066mhz of ram ddr3. But all I know is my motherboard only supports ddr2 ram. Can you find me the best 4gb of ram laptop memory 800mhz? It will be appriciated.

Thank you

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Dell Studio 15 Hp dv6000
Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
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 01/23/2009 12:29 AM
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PCMIKE09
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Okay I think i got something here and please correct me if I am wrong.

Since my processor only has 800mhz of fsb that means my ram can only be 800mhz or lower, not higher.
Is this correct?
Heres a noob quiestion, what does your processor have to do with ram?

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Dell Studio 15 Hp dv6000
Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
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 01/23/2009 01:36 AM
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PorscheRacer14
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Right now your RAM is running at a 1:2 ratio, which is really good fo an Intel system. Most of the time they run at something like 1:4 or however it divides up. For example, say an old Intel Pentium or Athlon which still both used the front-side bus at that time have a 100MHz bus. If you were to put in say, 133MHz DRAM, your RAM is running faster than your FSB. So, if your RAM has a peak bandwidth of (I'm guessing here for this RAM) 1.5GB/s you'll only really reach say a bit over 1GB/s at most because your BUS cannot keep up with the RAM.

That's why, back then, when AMD had unlocked multipliers on all it's CPUs (only downwards though) people would drop a multiplier or two and crank up the FSB to match the speed of the RAM so both the FSB and RAM would operate together, in sync. Intel later on unlocked their downard multipliers.

That's also why I loved the socket 939 systems when they came out. The base clock ran at 200MHz and the top supported RAM runs at 200MHz (or 400MHz effective since it's DDR). Everything worked together and hi-fived each other as they blew Intel out of the water.

Think of it this way. Like those timings I showed you, if it takes 3 cycles on my system to access a row in my RAM, it takes 3 cycles of my CPU to wait for the next command after it issues the request to find the data from the row. I'm speaking in layman's terms here BTW. Now, let's look at some Intel CPU's at the time. Most used a 133MHz FSB that was quad-pumped to 533MHz and top DDR2 RAM at that time was 667MHz. So their bus speed was low and artificially raised to help out the RAM to CPU clock cycle ratio. If the RAM has the same 3 cycle latency as mine does, it'll take the CPU longer than 3 cycles because it's not in sync.

Obviously this isn't a detailed explanation because Intel has a FSB to go through which adds clock cycles and latency and then so on.

You can put 1066MHz RAM in your laptop, but it's really rare to find (I don't even know if many companies make them anymore) and it would default down to 800MHz becasue that is all your motherboard's FSB can support.

It's also why overclocking an Intel and AMD system, has been different. AMD systems love RAM with tighter timings, becasue of it's memory controller and how tight of a ratio they work together. Usually 1:1 or 1:2 (besides some half multiplier CPUs or odd multiplier CPUs as is the case now with AM2, AM2+ and soon to be AM3. Intel systems love faster RAM with higher bandwidth and looser timings to get higher-speed is better off to get the bandwidth for them

My old Intel laptop runs the RAM at 1:1 because the RAM is 400MHz and my FSB is 800MHz. Remember, these are affective ratings. The RAM really runs at 200MHz and the FSB really runs at 200MHz. If I go to 533MHz RAM I will be running the FSB at 200MHz and the RAM at 266MHz. I will be out of sync, but the faster RAM will give my Intel system more bandwidth, and this is what Intel systems with the FSB love. It helps hide the latency with more data being moved at a faster rate.

OK, I need to sit down and take a break before my head explodes and I start making things even more confusing....

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 01/23/2009 03:27 PM
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PCMIKE09
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So porscheracer,
You kind of lost me, From what I can interpet is that if i use the 1066mhz of ram in my laptop it would drop it down to 800mhz.
So if I upgrade my processor to 1066mhz fsb, I will be able to put the 1066mhz ram in. Oh and my bios doesnt support underclocking. Is it possible to tweak my ram without overclocking?
And thanks for the review


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Dell Studio 15 Hp dv6000
Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
3gb 800mhz ram 2gb 667mhz ram
Ati Mobility Radeon hd 3450 256mb Nvidia geforce go 6150
 01/23/2009 03:37 PM
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PorscheRacer14
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The thing is, it's not the CPU on Intel systems that decide what works, it's the northbridge controller that decides this. If your chipset can only handle 800MHz FSB, then only those specific processors have to be used. And even then, your BIOS will limit those to a selcet few for your laptop.

Now, AMD kind of gets around this, but if AMD's northbridge only supports up to DDR2 800MHz, then that's all that particular motherbaord can support. At least, it will run 1066MHz RAM, just at 800MHz though, whereas, on an Intel system, if the FSB is larger than what the chipset supports, it will not work at all (usually, some rare instances they do work, although not too well). With AMD having an integrated memory controller, it can simplify some of the upgrade process. The only hard part, is the memory side of things. Oh well, they are doing better than Intel, who is doing the same thing now. AMD's IMC can operate 2 memory standardsm, while Intel's cannot.

So no, upgrading to a 1066MHz FSB CPU, will not work. At least, in theory, it shouldn't work, and since it's a laptop design, I can't see it having BIOS options or a chipset that supports future FSB improvements in it's design.

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 01/23/2009 04:04 PM
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PCMIKE09
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okay quick question,
To reach my processor is very easy all i have to do is remove the heatsink, anyways how could i tell which processor will be compatable with my motherboard. I see newegg sells mobile processors.

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Dell Studio 15 Hp dv6000
Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
3gb 800mhz ram 2gb 667mhz ram
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 01/23/2009 07:06 PM
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PorscheRacer14
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Run the profram called CPU-Z and look at the information for motherboard and most importantly the chipset. The northbridge chipset and BIOS will determine what CPUs you can use. Your chipset may support a newr CPU, but if your BIOS doesn't, it's pointless then.

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 01/23/2009 07:38 PM
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PCMIKE09
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Igonna upload a pic

HERE FIRST TIME I UPLOADED AND I THINK I GOT IT. Porsche you think you can help me?



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Dell Studio 15 Hp dv6000
Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
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 01/23/2009 07:50 PM
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PorscheRacer14
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Well according to Intel, you can run a CPU and RAM with 1066MHz speed settings. The link I provided shows the support for that chipset.

http://ark.intel.com/chipset.aspx?familyID=35515

Again, like I mentioned before, Dell would have to provide BIOS support so the CPU can work with that chipset. You'll have to go to the Dell site for you laptop and read the BIOS release notes. It is Dell, so you might luck out as they are a big Intel supplier.

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 01/23/2009 08:03 PM
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PCMIKE09
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Okay thanks, lol you see my cheap ram company Hyundai electronics. Sounds like a cheap brand.

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Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
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 01/23/2009 08:51 PM
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PorscheRacer14
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They make some very good industrial equipment, that's for sure, and even make cars. Quite a diverse portfolio of interests.

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Jessie James 59
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Just for general information, both G. Skill and Kingston make 4Gb PC2 (2 x 2modules) at 4-4-4-12 timing for laptops.
 01/24/2009 04:44 PM
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PCMIKE09
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Where would I find that.

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 01/24/2009 05:41 PM
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PorscheRacer14
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I guess try newegg or your favourite computer parts store and compare the specs of RAM.

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 01/25/2009 12:30 AM
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PCMIKE09
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If i get ram with a 5-5-5-15 timing will I notice any performance improvements than my 6-6-6-18 timings.
Oh I heard on other sites that vista 32bit supports 4gb of memory.

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Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
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 01/25/2009 03:18 AM
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Jessie James 59
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I purchased a Kingston hyper 4Gb Kit (matched pair of 2Gb modules with 4-4-4-12 timing) for $45.00 US, at New Egg in December. The G. Skill 4Gb Kit with 4-4-4-12 timing was about the same price at New Egg.

If you put your laptop under a heavy load ( Playing games or Video editing) the difference between 6-6-6-18 and 4-4-4-12 timing is like night and day. With 4-4-4-12 you do not see your videos freeze or become pixilated. Under normal or light load you will see little difference.

The second part of that equation is you need a processor with enough power and speed to get the job done (it dose not hurt to have a 7200 RPM hard drive also).

The RAM upgrade, from 2 to 4Gb and the change in timing made the laptop preform, like a good laptop using Windows XP, except this laptop is using Vista!!!!

Edited: 01/25/2009 at 04:50 AM by AMD Processors Moderator
 01/25/2009 09:29 AM
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Moomanerism2
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I know this is late, but it should add a bit to the thread:

http://forums.amd.com/forum/me...&keyword1=undervoltinghttp://forums.amd.com/forum/messageview.cfm?catid=16&threadid=100241&highlight_key=y&keyword1=undervolting

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PCMIKE09
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Is it better to have 1 stick of 4gb of ram in, or 2 stick of 2gb of ram in.
Also is there a automatic undervolting tool.

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Dell Studio 15 Hp dv6000
Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
3gb 800mhz ram 2gb 667mhz ram
Ati Mobility Radeon hd 3450 256mb Nvidia geforce go 6150

Edited: 01/25/2009 at 05:53 PM by AMD Processors Moderator
 01/26/2009 12:07 AM
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Jessie James 59
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It is better to have a matched pair of RAM modules. Theas are sold as Kits by the manufacturer, 4Gb will be a matched pair of 2Gb stickes.

With 2 sticks of RAM you have 2 pipelines to push information through, so your system should push and retreve information at a faster rate.

The same concept as 2 hard drives set to RAID 0 you should have more information available at any given time. the truth is this only happens under heavy loads in the system such as games or video editing.
 01/26/2009 03:34 AM
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Mime
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Originally posted by: Jessie James 59

It is better to have a matched pair of RAM modules. Theas are sold as Kits by the manufacturer, 4Gb will be a matched pair of 2Gb stickes.


Most desktop boards don't support 4GB modules, so in this case there isn't any choice but to go with a 2x2 setup.

With 2 sticks of RAM you have 2 pipelines to push information through, so your system should push and retreve information at a faster rate. The same concept as 2 hard drives set to RAID 0 you should have more information available at any given time. the truth is this only happens under heavy loads in the system such as games or video editing.


Well... it's "happening" all the time whether the system needs it or not, and before dual channel boards came around it made no difference bandwidth-wise if there was two memory modules in the system instead of one. Aside from that the biggest difference between something like raid0 and dual channel memory is that raid0 scales depending on the number of drives you use where dual channel memory doesn't. If you put four drives in raid0 you're going to split the data up four ways(which is not a good idea by the way, at least when using common desktop hardware). If you put four memory modules in a system that supports dual channel memory you've still got only dual channel memory.

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 01/26/2009 04:16 PM
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PCMIKE09
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Is there any ram stability tests?

Was gonna undervolt my hp laptop, but the lowest voltage set is .50volts.
Thats freagin low and also I reformated and it seems to run cooler One problem is I hate the fan always being on. It drives me insane. And I can't even change the fan setting via speedfan because its not supported.
Anyways AMD does a pretty good job and getting the lowest stability volts, rather than intel. If anyone had a hp laptop, Porsche i think you do, are you expirences the fan always being on. I started to notice it when I upgraded the bios.

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Dell Studio 15 Hp dv6000
Intel C2duo t5800 2.0ghz Amd Turion tl-50 x2 1.6ghz
3gb 800mhz ram 2gb 667mhz ram
Ati Mobility Radeon hd 3450 256mb Nvidia geforce go 6150
 01/28/2009 11:41 AM
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MU_Engineer
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Originally posted by: PCMIKE09

Is there any ram stability tests?


Memtest86+. You can download it there or get a hold of just about any bootable Linux CD and it will be a boot option as well.

Was gonna undervolt my hp laptop, but the lowest voltage set is .50volts.

Thats freagin low and also I reformated and it seems to run cooler One problem is I hate the fan always being on. It drives me insane. And I can't even change the fan setting via speedfan because its not supported.


I have a Dell Latitude E5400, which has the exact same C2D T7250 as yours does but has the GM45 chipset instead of the PM45 chipset. Intel locks the minimum voltages on Core 2 Duos to whatever voltage the chip idles at by default, and on the T7250, it is 850 mV. SpeedFan or i8k doesn't really support the newer Dells very well, but a trick is to hit Fn+Z to have the system reassess the fan speed after the CPU is done doing something intensive. More often than not the fan RPM drop quite a bit or shut off entirely.

Anyways AMD does a pretty good job and getting the lowest stability volts, rather than intel. If anyone had a hp laptop, Porsche i think you do, are you expirences the fan always being on. I started to notice it when I upgraded the bios.


AMD doesn't lock their mobile chips' voltages to the stock idle voltage like Intel does, so we really can't tell how well Intel's CPUs perform at low voltages. I suppose this is to prevent OEMs from just putting a standard and much-less-expensive Core 2 Duo in a tiny laptop and locking the maximum speed in the BIOS to the low 1 GHz range rather than shelling out $300+ for special ultra-low-voltage versions.

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