Thats hard to answer, it all depends on what your looking for. A base low res system just to play with some eye candy on will probably run about $500. Thats assuming you have and OS, monitor,keyboard, mouse and DVD drive. You would have about $100 each for vid, cpu, ram and $50 for hard drive,case, motherboard and psu. This is very a tight budget but The system would play new game at low res and highish setting for the most part with a little OCing. With a budget around $700 with $200 each for vid and cpu you would get a alright gaming rig.