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Topic Title: PSU Watt Power ?
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Created On: 12/04/2003 10:04 AM
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 12/04/2003 10:04 AM
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Prezjamin
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Posts: 65
Joined: 11/25/2003

My PSU has recently broken and I need to purchase a new one. My current one is 300 watts but I think this may be a little underpowered for my system which is:

AMD Athlon 2000 XP
256mb DDR RAM
Geforce 2 Ti 64mb
20gb HD
MSI 745 Ultra (motherboard)

What is the difference between a 300 watt PSU and a 500 watt PSU, is it simply that the later is more powerfull ?

Does anyone have any suggestions about what power PSU i would need for my system, I was thinking of a 400 watt PSU whould that be sufficiant ?

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System Specs

AMD Athlon XP2000+ 1.67ghz
MSI 745 Ultra
ATI Radeon 9600 256Mb
256Mb DDR RAM
20Gb HD
Windows XP Pro SP1
 12/04/2003 10:57 AM
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blueice
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300w realisticly is ok for what you have now, but if you start upgrading you're going to be lacking. I would consider at least a 400w, maybe 450w. This will give you plenty of power for future upgrades, like better graphics card, more fans, dvd drive, etc. Don't skimp on the power supply either, buy a good name brand

PSU comparisons' ">http://www.amdmb.com/article-display.php?ArticleID=270

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MSI K7N2 Delta Ultra 400
AMD Barton 2500+ oc'd to 3200+ (200x11)=2.21ghz
Antec 430W True430 * stock HSF w Arctic Silver III
2x512 Buffalo DDR400 CL 2.5 Winbond
Vantec Iceburg RAM heatspreaders
Chieftec Dragon server tower w/ 2 intake, 2 exhaust fans
Gainward FX5900 Ultra 128mb 400/850
WD 120GB 7200rpm SATA * Windows XP Pro
 12/04/2003 11:34 AM
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bobo.vn
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and when you use more than 1 HDD, 350W is needed.

my system uses 250W PSU now, and no problem.

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::: AMD 64 3000+ Winchester @ 2,6GHz' ">http://img.hexus.net/v2/overclocking/AMD3000W/CPUB.jpg ::: CoolerMaster Hyper 6 ' ">http://www.overclockersclub.co...ster_hyper6_review.php ::: Corsair XMS PC3500 BH5' ">http://www.extremeoverclocking...Corsair_XMS3500_1.html ::: GA-K8NF9
 12/04/2003 11:41 AM
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Greyhound
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A good 400W PSU will be absolutely sufficient even for future upgrades unless you're planning to overclock or run A LOT of stuff plus a very power-hungry videocard like a Radeon 9800 Pro/XT or Geforce FX 5900/5950 Ultra.

And do make sure you get a good brand like Antec or Enermax - don't buy some cheap no-name thing

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 12/04/2003 12:04 PM
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dafanman
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Prezjamin,
A couple of things to consider:
With what you have now hardware wise is not really alot, compared to if you had a new mb, ram, more powerfull video card, ect.....

You could buy a lesser wattage psu that may serve your needs today, however if you decide to upgrade anytime soon, you would benefit by buying a good psu now.

here is a recent psu roundup
Power supply roundup' ">http://www.amdmb.com/article-display.php?ArticleID=270

If you need anymore power supply info, send me a pm, Ive just fininshed gathering alot of diff psu info for a couple of diff forums
 12/04/2003 01:17 PM
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Prezjamin
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Posts: 65
Joined: 11/25/2003

Thanks for all the help guys

-------------------------
System Specs

AMD Athlon XP2000+ 1.67ghz
MSI 745 Ultra
ATI Radeon 9600 256Mb
256Mb DDR RAM
20Gb HD
Windows XP Pro SP1
 12/04/2003 11:37 PM
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DrPoor
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Posts: 78
Joined: 10/16/2003

Simply buying a higher max watt power supply is not enough. Remember that a psu is not really a single unit, think of it as many different units in one box. Look on the side of the psu you are going to buy, you will see a listing for the max output on the different "rails." The rails are 5v, 3.3v, and 12v. The important one is the 12v rail, your mobo, cpu and fans all run off the 12v rail and they draw the majority of power from your psu. What your looking for is at least an 18a rating on the 12v rail, I would recomend 20 or above to give yourself plenty of room. Getting a 400w generic psu with 12a on the 12v rail is useless, you would be much better off with say a 300w Enermax with 22a on the 12v rail.
 12/04/2003 11:41 PM
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Mime
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Joined: 10/06/2003

Or better yet you could get an Antec power supply that has independant power rails so that a heavy load on one rail won't cause the others to take a dive as well.

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 12/04/2003 11:53 PM
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Ardrid
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Posts: 12398
Joined: 10/08/2003

Yeah, I'm going to have to agree with Mime on that. Might I suggest an Antec TruePower 380W? It's got plenty of wattage for you needs, independent rails, and plenty of juice on those rails to keep your hardware happy.

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Intel Core i7 860
ASUS P7P55D-E Pro
Corsair HX650W
Corsair XMS DDR3-1333 (4GB @ 8-8-8-24)
Sapphire Radeon HD 6870
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Western Digital Caviar Black 1TB
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