A GTX470, a GTX260 for physics and a 2.3ghz quad ?
You should be more worried about getting a cpu that can push data to either of those cards by themselves than a new psu.
Ever heard the term " bottleneck " ?
If i need a new CPU, i want it to be capable but affordable, as is the same for a new power supply and tower.
Basically i bought the above spec with just the GTX 260. I decided i wanted a new card (GTX 470) with ded. Physx (use the old gtx 260). However for some reason my PSU died so now i am looking to get a new cooling chassis, Liquid CPU cooler, and suitable PSU.
I was hoping that the CPU would still be capable. I am struggling to find a PSU and Chassis Combo that is the right power (cos i don't know how much i need) and a good price.