I am thinking about getting a gtx275 oc and maybe another one in the future. What kind of power supply would I need for SLI under $150? Also, would a e7400 dual core bottleneck a single or SLI gtx275?
A good 700w or thereabouts should be around the size you ought to be looking at but do not skimp on quality, and CPU wise I wouldn't use less than an E8400 for SLi'd GTX275's.