Sign in with
Sign up | Sign in
Your question

What size PSU do I need?

Last response: in Components
Share
July 14, 2009 8:42:56 PM

Here is my system build:

i7 920 overclocked @ around 4ghz

EVGA E758-TR Motherboard

HAF 932 Case

12gb ram

1 x Western Digital Black 640Gb Hard drive

2 x Western Digital Black 1TB Raid 0

1 x GeForce GTX 285 2GB

1 x DVD Burner

1 X Blue Ray Burner

1 x Card Read

Cooler Master V10

What size of power supply would I need for this? I was wanting to get a 750w psu, but I'm afraid it might be too small. I just don't know.

More about : size psu

a b ) Power supply
July 14, 2009 9:31:56 PM

750W sounds fine !.
What i would check is how many amps you have on the 12v rail.
The GTX 285 2GB needs 40 amps on its own.



Related resources
a c 243 ) Power supply
July 14, 2009 9:34:44 PM

Shaun o said:
750W sounds fine !.
What i would check is how many amps you have on the 12v rail.
The GTX 285 2GB needs 40 amps on its own.

750 does sound fine.
Amperage is most important.
40 amps is for the system with the card, not just the card.
a b ) Power supply
July 15, 2009 6:20:10 AM

Good quality 550W is plenty.
July 15, 2009 4:38:21 PM

I agree, A quality 700 - 800 would be more than enough. That would be the thing to keep in mind though, using a GTX 285 will need most of the AMPS. I would suggest Corsair, Enermax, or Antec Signature. Hope that helps.
a c 144 ) Power supply
July 15, 2009 9:02:02 PM

theAnimal said:
Good quality 550W is plenty.

I disagree this time. Good 550's put out in the neighbor of 40 amps. That's just a little close for comfort.
July 15, 2009 11:59:08 PM

i7 920 @4Ghz and GTX285 @optimal OC can't even chew over 460W (not wall) when benched, a good modern 550W that has passed 80Plus can sustain >90% load 24/7 no problem.
Occasionally Corsair 550VX can be found cheap. Antec Earthwatt 550W is another that can be found for good price.

>700W is really meant for a mild OC'd dual-GPU rig.

Even DICE benching a Q6600 @4.3Ghz and X2900XT (crazy card) @1.1Ghz back then I could do it with a TT Toughpower 600W (80Plus CWT platform).
!