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Topic Title: Stock Fan Phenom 940
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Created On: 03/23/2009 03:34 AM
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 03/23/2009 03:34 AM
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A3d
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I'm curious, what's the max fan speed on the stock cooler for the Phenom 940? My desktops running really hot and my max rpm only goes to about 3200.

I'm getting about 35c idle. Running prime95 would get my temp to 60 in about 20 min. These are my temps for a non overclocked desktop.
 03/23/2009 11:20 AM
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NemesisChild
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I'm not using the stock HSF, I've got the Arctic Cooling Freezer 64 Pro.
But, I believe the max. RPM for the stock 940 cooler is 5,000 RPM.
If you have an ASUS board, disable the Smart Fan option in the bios.
Also, I would recommend disabling Cool & Quiet to get the max. cooling benefit of the HSF.
35c idle is good, but you need to reduce your load temp....how is your case cooling?

-------------------------
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 03/23/2009 11:34 AM
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A3d
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There isn't any problems with case cooling. I've got 230cm fans in the front, side, and top. On the back I have a 120cm exhaust. I think I may have used too much thermal paste?
 03/23/2009 01:27 PM
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birdboy84
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hmm, its kinda hard to use too much paste. are there any differences in tempature readings between bios idle, speed fan, AMD Overdrive?

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 03/23/2009 02:39 PM
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A3d
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I'm not at my desktop now so I can't check.

But once I'm in bios, shouldn't the fan be at max rpm?

When I'm on cool n quiet or asus' EPU power saving mode, my fan speed would vary from 800-3200. With 3200 as max.

Can someone confirm that 940 stock fan can get higher than 3200?
 03/23/2009 04:50 PM
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NemesisChild
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Originally posted by: A3d

I'm not at my desktop now so I can't check.



But once I'm in bios, shouldn't the fan be at max rpm?



When I'm on cool n quiet or asus' EPU power saving mode, my fan speed would vary from 800-3200. With 3200 as max.



Can someone confirm that 940 stock fan can get higher than 3200?


Like I said disable all power saving features (Smart Fan, Cool & Quiet, and EPU), then you can get a handle on the fan speed.
Keep in mind that the stock AMD coolers have heat sensors, so the RPM will increase as the CPU temp rises.
Run a CPU stress program like Everst to determine the max RPM of the fan.

-------------------------
Phenom II X6 1100T B.E.@ 4.26GHz
Corsair H70 Core Hydro
ASUS Crosshair V Formula
2x4GB G.Skill RipjawsX@ 1894MHz, 9-10-9-28
SLI: 2x EVGA GTX 570's@ 902/1804/2032
Creative SB X-Fi Xtreme Gamer
Corsair HX850W Modular
Cooler Master HAF 922
2x Win 7 Home Premium (x64)
 03/23/2009 05:09 PM
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Heffy
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If they're using the same 70x70x15mm fans as on previous stock coolers (AFB0712VHB), then the max RPM is 5200 RPM, as NemesisChild said. This is however, the ultimate max RPM it can support, the effective RPM is somewhere near 4700-4800RPM. That's the highest I've seen it spinning at, with Cool'n'Quiet and Q-Fan disabled. However, there are several similar fans with lower RPMs, one of which is 3300RPM. If you want to determine the max RPM for your fan with certainty, you can check it here, with the model number.
 03/23/2009 08:01 PM
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baza77
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Yep you can use too much thermal paste, and the best way to get a good contact is to spread an even layer over the processor using an old credit or phone card. Then place the heat sink on it. It doesn't have to be perfect as long as you cover the whole processor with an even thin layer
People who say use a pea size dollop on top, that's just wrong, as all of the processor will not be covered and the pressure of the heat sink will not help to coat the processor in thermal paste, and that's why they get hot?

and a3d is your bios upto date. when the fan hits 5500 rpm it sounds like a hairdryer, it will do your head in after a while? best to upgrade heatsink and fan.
 03/23/2009 08:35 PM
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kazgirl
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Originally posted by: baza77

People who say use a pea size dollop on top, that's just wrong, as all of the processor will not be covered and the pressure of the heat sink will not help to coat the processor in thermal paste, and that's why they get hot?
.



Hmm well thats a mighty odd thing to say...given that a well known and highly repsected manufacturer of Thermal Interface Material ( Artic Silver) recommends this very method on their website for application of their product.... and I'm pretty sure that they will have a better understanding of what method works best for their product than you....!!!

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3DMark06 = 20717 / 3DMark Vantage = P13618 / My Overclock Guide / My Troubleshooting Guide
 03/23/2009 08:40 PM
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baza77
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so your saying its not better to spread the paste and just use a dollop. cause thats aint right, and the well known manufacturer should get up to date with times.
 03/23/2009 08:46 PM
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kazgirl
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I think yopur the one who needs to get up to date with the times.... if you don't even recognise the manufacturers name when its typed there for you, its Arctic Silver perhaps the most popular brand of TIM that is used, and their own application guide for their products describes using the grain of rice sized method of applying their product....

The technique of using a credit card to spread a layer across the whole CPU is no longer considered as being a popular method of TIM application...!!!

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3DMark06 = 20717 / 3DMark Vantage = P13618 / My Overclock Guide / My Troubleshooting Guide
 03/23/2009 09:54 PM
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NemesisChild
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kazgirl is absolutely right regarding AS5: 3/4 the size of a BB or a grain of cooked long rice is placed in the center of the CPU.
There is nothing in Arctic Silver's instructions that says it has to be spread across the entire top of the CPU.
If you read their instructions, it explains why this method is proven to work.

-------------------------
Phenom II X6 1100T B.E.@ 4.26GHz
Corsair H70 Core Hydro
ASUS Crosshair V Formula
2x4GB G.Skill RipjawsX@ 1894MHz, 9-10-9-28
SLI: 2x EVGA GTX 570's@ 902/1804/2032
Creative SB X-Fi Xtreme Gamer
Corsair HX850W Modular
Cooler Master HAF 922
2x Win 7 Home Premium (x64)
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