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GTX280 Power Supply Reqs

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tnywatkns   04-15-2009 at 01:38:12 PM

i was just wanting to know wat is the minimal amout of power two gtx 280's require, the new computer i'm building consists of a i7 920, 6gb of ddr3, 1 cd/dvd, and 3 hdd's. the power supply i'm currently using is an ocz gamestream 700w, although i'm sure it's not enough for two 280's

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Bronze Graphics badge EXT64   04-15-2009 at 01:51:41 PM
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Give this a try. I believe it has the new components you are looking at.

 

http://extreme.outervision.com/psucalculatorlite.jsp

 

One word of caution, depending on age and quality of that PSU, it may not perform as advertised.


Message edited by EXT64 on 04-15-2009 at 01:51:53 PM
------------------------------ Phenom II X4 940 BE 3.0GHz - 1.25V > GA-MA790GP-DS4H > XFX ATI 4850 1GB > 4GB OCZ Platinum 1066MHz 5-5-5-15-2T > PCP&C 610W
Athlon II X2 250 3.0GHz > GA-MA770T-UD3P > Sapphire ATI 4650 512MB DDR3 > 4GB OCZ Platinum 1600MHz@1066MHz > XP/Win7 Enter 64
 Reply to EXT64
tnywatkns   04-15-2009 at 01:54:05 PM
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thanx i'll give this a try!

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Bronze Graphics badge EXT64   04-15-2009 at 01:56:30 PM
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A quick 'very conservative' try by me brought up 701W. You may be cutting it a little close. I like to have a decent margin over max.

 

Edit: assuming the PSU is in good shape it probably could do it (since rarely is everything maxed, and like I said, I did throw in a couple of extra things) but that still may be a little close for comfort. You could also consider a dedicated GPU PSU if you don't want to upgrade your PSU (assuming you think you need more than 700W).


Message edited by EXT64 on 04-15-2009 at 02:02:27 PM
------------------------------ Phenom II X4 940 BE 3.0GHz - 1.25V > GA-MA790GP-DS4H > XFX ATI 4850 1GB > 4GB OCZ Platinum 1066MHz 5-5-5-15-2T > PCP&C 610W
Athlon II X2 250 3.0GHz > GA-MA770T-UD3P > Sapphire ATI 4650 512MB DDR3 > 4GB OCZ Platinum 1600MHz@1066MHz > XP/Win7 Enter 64
 Reply to EXT64
tnywatkns   04-15-2009 at 01:59:57 PM
- 0 +

it recommends a 609w psu !?! can that be right?

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tnywatkns   04-15-2009 at 02:01:55 PM
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wait nvrmnd forgot to input capacitor aging, it's spitting out 792w

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Bronze Graphics badge EXT64   04-15-2009 at 02:04:28 PM
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Yeah, I didn't do Cap aging either. The other thing you can do is look at other peoples systems on the board and see what they have. I know L1qu1d has a 1000W, but that is for Tri-SLI.

------------------------------ Phenom II X4 940 BE 3.0GHz - 1.25V > GA-MA790GP-DS4H > XFX ATI 4850 1GB > 4GB OCZ Platinum 1066MHz 5-5-5-15-2T > PCP&C 610W
Athlon II X2 250 3.0GHz > GA-MA770T-UD3P > Sapphire ATI 4650 512MB DDR3 > 4GB OCZ Platinum 1600MHz@1066MHz > XP/Win7 Enter 64
 Reply to EXT64
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