hi all,i am building a gamimg pc with a limited budget,i need some opinions on my choice of hardware,i have a gigabyte motherboard GA-EP-45-UD3L----C.PU. is a INTEL CORE 2 DUO E7600 3.06GHZ----an NZXT APOLLO case and a radeon 4870 512 graphics card,as yet i have not decided on a power supply or ram memory for my pc,any ideas are very welcome, THANKS IN ADVANCE