I am building a new PC with the following components: P55-USB3; (2) 2 gig Patriot Memory 1066; Intel i5-750; western digital 500 gig hard drive (blue); (2) LG DVD-R 16x and a EVGA GeForce GTX 460. I am wondering what is recommended to run this complilation? I have a Rosewill RP600v2 but it will not start up the system. I assume it is the power supply and that it is not big enough. Thanks very much for your recommendation. I don't want to spend $150 on a power supply unless it is absolutely necessary.