Originally Posted by Captain_cannonfodder
Only going to be folding on the GPU's.
The reason why I'm confident is because NVIDIA recommends a 450W to power a system with one GTX 460 in it, and that's even concerning power supplies with a 450W "peak" rating. The VX550 has a 550W "continuous" rating.
In addition, the 8800 GS under full load appears to pull an additional ~50W from the power supply according to this:
They're measuring the power draw at the wall.
While idling, their test system
was pulling 136W from the wall, and then it pulled 185W from the wall under maximum load making for a difference of 49W.
Finally, NVIDIA says that the GTX 460 could pull a maximum of 160W from the PSU under full load. So if folding causes the GPUs to be maxed out, then it sounds to me like the maximum power draw from the PSU between the two cards would be about 210W which leaves tons of power left over for folding on the CPU at the same time.