I got a budget of $90 and a Phenom II x2 555 CPU (Did not unlocked ) that I can return for $105 credit, I have installed in my pc 2GB Ram (XP 32Bit) and I might install Windows 7 Ultimate 64Bit or stay with XP32(if I don't purchase the extra ram). With the credit and budget I can either get a 3.2GhzQuad core alone and stay with xp or a 2.8GhzTri-core+2GB Ram Stick combo and upgrade to 7 64bit. What is the best choice for gaming? Important Note: Got an XFX Radeon HD 5770 installed on the rig but seems it needs a better processor or ram to make it to the fps shown in some reviews. I also check out GTA IV in the Can You Run It site and in recommended there is the phenom x3 2.4ghz so I guess the phenom II x3 2.8ghz is much better in that aspect.