Hi all, I have my rig almost set up-AMD 64 3200+ NC core, DFI lanparty UT NF3, OCZ platinum Rev 2 2X 512, AIW 9800 Pro. I plan to overclock the processor hopfully to 2.5Ghz. My question is that I have an Antec case which came with 300W power supply....Is it enough? Should I invest in a new PSU...