I just got an old dell computer for free, and was wondering if i would be better off putting a new psu and ram in it or buying a whole new system. I also dont know if the motherboard will let me overclock the intel core 2 duo 6600 @2.4Mz. would this system (with 8gb of ddr2 ram and a EVGA GTX 580 ds) be a decent enough gaming rig?