Sign in with
Sign up | Sign in
Your question

About the power supply

Last response: in Systems
January 2, 2011 1:20:13 AM

Can I get a 750watt psu if my system only require 400 at the moment because I dont have a power supply but plan on upgrading my HD 5670 to a 5770 then crossfiring a little after that.

More about : power supply

Best solution

a c 140 ) Power supply
January 2, 2011 1:46:10 AM

A 750 watt PSU will operate at close to peak efficiency w/ a 400 watt load. I would note however that the 650 and 850 watters are the sweet spot for PSU's price wise.

This 850 watter is a top end (10.0 performance rating on jonnyguru) and is only $109 .... the 750watter is $20 more !

Twin 5770's require only a 600 watt PSU however

in which case this 650 watter will do just fine

January 2, 2011 2:01:18 AM

Could you (or anyone else) explain what peak efficiency means psu wise? I read somewhere that its good to have 200w extra over head room.

Kinda dumb but would a 850 watt draw 850 watts from the wall? Or only how much is required.
January 8, 2011 10:56:34 PM

Best answer selected by Nihilite.