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!