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i am trying to power 2 gtx 480s need help!! - Page 3

post #21 of 32
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341052 60 after gift card and rebate.

or

http://www.newegg.com/Product/Product.aspx?Item=N82E16817703027
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post #22 of 32

this is what i have powering my 2 480's (the OCZ). it does get a little hot under heavy load with my setup but it hasnt failed yet.
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post #23 of 32
A cheap 1000 PSU is no better than a 700-800 quality PSU.
Some of them are so inefficient, they fall 200-300W under the rated power output.

I ran two 480s OC on a Corsair 850W. CPU and RAM OC'd as well.

Stay away from cheap PSUs and programs such a Furmark.
Furmark wastes energy. 3DMark11, Heaven and a few hours of gaming will tell you if you OC is stable.

Get the Corsair GS850. Corsair PSUs often go above the rated power output.
Edited by WorldExclusive - 4/24/12 at 12:19am
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post #24 of 32
It's not just the wattage and brand, hence why most people are recommending 1000w PSUs. Its also the 12v rail that have to power those things plus whatever overclock, so you'll need plenty of amps which is what most 1000w will be able to supply.
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post #25 of 32
Quote:
Originally Posted by Boinz View Post

It's not just the wattage and brand, hence why most people are recommending 1000w PSUs. Its also the 12v rail that have to power those things plus whatever overclock, so you'll need plenty of amps which is what most 1000w will be able to supply.

no


a PSU that puts out 650w on the 12v rail will put out 54 amps, regardless of the brand. its not like PSU makers can be like, lets make a psu that put out 40 amps on the 12v rail and rate it at 650w. because a PSU that puts out 40a on the 12v rail can only supply 480w. there is a mathematical equation for this stuff.
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post #26 of 32
Seasonic X750 is on sale with a $40 promo code making it $120. I would get that hands down.


http://www.newegg.com/Product/Product.aspx?Item=N82E16817151087&Tpk=x750%20psu
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post #27 of 32
850 watts and you'd be safe, can't say much about 750 considering you have a 6 core AMD CPU+2 480s.
post #28 of 32
Quote:
Originally Posted by TurboMach1 View Post

no
a PSU that puts out 650w on the 12v rail will put out 54 amps, regardless of the brand. its not like PSU makers can be like, lets make a psu that put out 40 amps on the 12v rail and rate it at 650w. because a PSU that puts out 40a on the 12v rail can only supply 480w. there is a mathematical equation for this stuff.

Actually, this is what crappy brands do, they take PSU's with older topologies that don't have more than 80% or so of their power on their 12v rail(s) and rate them higher than they should be for a modern system. Any decent PSU these days should have 90% or more of their power available on the 12v rail, but that does not mean all of them do. Just go look at the units Logisys and Diablotek sell and you'll see.
post #29 of 32
Quote:
Originally Posted by bR0ken_pr0Jector View Post

Quote:
Originally Posted by TurboMach1 View Post

no
a PSU that puts out 650w on the 12v rail will put out 54 amps, regardless of the brand. its not like PSU makers can be like, lets make a psu that put out 40 amps on the 12v rail and rate it at 650w. because a PSU that puts out 40a on the 12v rail can only supply 480w. there is a mathematical equation for this stuff.

Actually, this is what crappy brands do, they take PSU's with older topologies that don't have more than 80% or so of their power on their 12v rail(s) and rate them higher than they should be for a modern system. Any decent PSU these days should have 90% or more of their power available on the 12v rail, but that does not mean all of them do. Just go look at the units Logisys and Diablotek sell and you'll see.

I don't disagree with you there. But the fact still remains a *true* 750w psu that's not lying about its output will be more then sufficient and people saying you need 1000w are just giving people wrong info. This is why people are saying a "good" 750w will work because obviously a psu that claims 750 and really does 600 won't work.
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post #30 of 32
A good 750 watt is more than enough...
 
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