I have been moling this over and searching all over for an answer but I can't find exactly what I'm looking for. I am trying to figure out if my sub par ratings in heaven(~750) and 3Dmark (13240) are a result of my power supply of a cpu bottleneck. I am running an Nvidia GTX 470 with an Intel Q6600 G0 processor clocked at 2.80 Ghz and my PSU is a 600 watt with I think to be two 18 amp rails for my GPU. I am getting the same results as an SLI setup of 2 GTS 250s which I think really isn't right at all. I thought the GTX 470 would greatly improve game performance. Any input would be appreciated.