The Corsair 650W TX PSU.
Is it enough to drive the GTX 295?
It says it delivers 52A over the 12V rail, but at 624W.
That means if the other rails do, indeed, take their 180W that they need, the 12V rail will actually only push ~40A.
Is this enough for the card?
I'm guessing not, because my 3dmark Vantage result was ~9k (for GPU tests).