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Power Supply and Video Card, Please Help!

Last response: in Systems
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February 3, 2009 11:43:44 PM

Iam looking at getting a nice video card, This one to be exact.. http://www.newegg.com/Product/Product.aspx?Item=N82E168... And I realized to run my Quad Core and 8Gb of ram and this thing Iam going to need one decent power supply. My question though is this, this card says it needs a 575 W power supply with a 12 V Rail of 46 A, well my question that noone can answer is , how do i know how many amps my power supply has?? For example im looking at this Power Supply - http://www.newegg.com/Product/Product.aspx?Item=N82E168... if you look at it, it says it has 3 12V rails at 18a 16a and 16a Does this mean it will not be enough to run that video card ? or do you had up 18 16 and 16 to get 50 A on a 12 V rail there for it will be enough?? If not can someone find me a ps that is cheap and will support that card. THANKS!
a c 113 B Homebuilt system
a b ) Power supply
a b U Graphics card
February 4, 2009 1:46:23 AM

First off, that is not a good PSU at all. There are other things to consider besides wattage and 12V rail amps.

How to determine 12V rail amperage:
Look at the label. Do you see where it says that the 3 12V rails have 570W between them?

To figure out the total amps, divide 570 by 12. 47A.

Here is an actual good PSU at a great price:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

If you absolutely can't afford that one, then this will be OK:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
February 4, 2009 1:54:43 AM

Thank you so much, im going with the bottom one :) 
!