Hi guys I know most of you are heavily discussing the new gtx 680 and I am planning to get one in a few months, but I have just finished my new PC and its core i5 2500k over locked at 4.4ghz on a gigabyte z68xp-ud3p mono and I have my 2 old gtx 285 in sli to get through the next couple of months until I can raise the funds for a gtx 6 series card. My question is do I leave the physx option to auto or move that to the CPU and leave my 2 gtx 285 to do the rest without the exertions of the physx.