I would get rid of that antiquated rig. I build PC's for friends all the time and I hate screwing with older PCs. They always want to upgrade their old rigs, but usually all that is worth using is the case, the HD (as a secondary drive), and maybe the powersupply. My current newest rig is 3 years old and it is not up to par at all. I even updated the card to a TI boost, but it still chugs a bit on newer games. The last several PC's I have built for friends blow my PC out of the water. Get a 760 gtx with a Haswell I5, 8 gig of DDR ram minimum, decent power supply, and a SSD HD, and be set for a couple of years with 1080P gaming. Get a motherboard with UEFI and cruise through the bios. And if you are feeling particularly nerdy, make that a Haswell K (unlocked) processer, get a Cooler Master Hyper heatsink and overclock that bad boy. Use something like OCCT to run it through the ringer and make sure it is stable overclocked and you will be golden.