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Which power supply is needed?

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June 4, 2008 2:03:30 AM

At the end of the summer I am going to be building a new system. So far I have picked out

Mobo - Asus Striker II Extreme
Processor - Core 2 Duo E8500
Graphics - 2x GeForce 8800GTS 512MB 256-bit
Memory - DDR3 SDRAM PC3 12800
Case - Koolance PC4-1024SL


What power supply would be strong enough to run this. Thanks everybody.

More about : power supply needed

June 4, 2008 2:16:10 AM

Knowing that there are probably a few bits of hardware that you didn't list, you probably need a PSU of around 500wt. That would allow for a mild overclock as well. An Antec Earthwatts 500wt would do nicely. By the way, if you want more exact results for estimating the size of a PSU, go to:

http://www.extreme.outervision.com/PSUEngine
a b ) Power supply
June 4, 2008 2:29:07 AM

Because of the huge power draw at load for some of the new graphic cards, i'd go much higher with a PSU, especially where Xfire or SLI may want to be used. HD4870 est. 157 watts, HD4870X2 est.250w 260GTX est. 182w, 280 GTX est. 236 watts. Since you're building this at the end of summer you'll have a full choice in which GPU to use. The X45 motherboards are also going to be out soon, which may change your mobo choice. For PSU i'd be thinking a 750w just to give you some headroom......... bigger if you were going with 2 GTX280s.
http://www.atomicmpc.com.au/forums.asp?s=2&c=7&t=9354
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June 4, 2008 2:43:50 AM

Would a 1000W be too much. I was looking at the Corsair HX1000
June 4, 2008 3:00:35 AM

I got the 750W corsair as it has a single 60A 12V rail =D
a b ) Power supply
June 4, 2008 3:02:03 AM

@tanthanis:
For two 8800GTS cards, the HX1000 is way overkill. For two 9800GX2 cards, it's just fine according to that certification list. For two GTX 280 cards it will also be enough, because those cards will consume a little less than the 9800GX2 AFAIK.
June 4, 2008 3:02:52 AM

Why would having two rails be bad?
June 4, 2008 3:10:04 AM

So for this I need a psu in the 700 - 800W range
How are the Thermaltake psus?
a b ) Power supply
June 4, 2008 3:22:23 AM

Yup, 700W should do.

The rails don't really matter, as long as combined they have enough juice. Some people say one strong rail is best, and some say multiple smaller rails are best. For example the PC Power & Cooling Silencer PSUs have one rail, and the Enermax Galaxy series have multiple rails. Both are excellent anyway.

a b ) Power supply
June 4, 2008 3:25:01 AM

Problem with the Thermaltakes is that some of their PSUs get great reviews and ratings and other get poor reviews. You need to check exactly which PSU you'd be getting and do the research. PC power and cooling and Corsair PSUs have all gotten good or better ratings throughout their lineup.
http://www.hardwaresecrets.com/article/181 A good general tutorial about PSUs.
a b ) Power supply
June 4, 2008 3:27:40 AM

tanthanis said:
So for this I need a psu in the 700 - 800W range
How are the Thermaltake psus?


Check this out:
http://www.tomswiki.com/page/Tiered+PSU+Listings

The Thermaltake Toughpower PSUs are good. Ranked tier 2 on that list.

Are you thinking of the Toughpower 750W?
http://www.newegg.com/Product/Product.aspx?Item=N82E16817153036&Tpk=Toughpower%2b750W

The Silencer 750 is ranked tier 1 (i.e. top quality), it's much cheaper at Newegg today, and it pushes the heat out the back rather than into the floor. All reasons to prefer the Silencer.
June 4, 2008 3:32:52 AM

The only other thing I am looking for (but may have to do without) is modularity
a b ) Power supply
June 4, 2008 8:01:37 AM

If you have multiple rails you need to balance the load accross them, but this is no big deal.

I'm with most people here- Corsair or PCP&C at 700-800Watts.
!