@WiZZaRd-46 Well scroll back up and do my basics first, but honestly your running "8 bg of ddr2" tells me the GPU is probably twiddling it's thumbs as your System is bottlenecking in key points. DDR2 is very old and not made anymore, all the systems specs / benchmarks on DDR3 RAM, which provides more data from the HDD to the CPU (load code in chunks from HDD to the RAM, to then pass to 'process' via the CPU then assign to the components - sounds, video, etc. - to do that job).
That would potentially also indicate other choke points of trying to move data from one part to another that won't be compensated by getting high end video cards or using Matle, OpenGL, etc.
You should get a new Mobo/RAM, and you can potentially keep the CPU, but considering the cost of the first two components I mentioned, the better deal would be to look on www.slickdeals.net for a i7 Desktop, and just swap the GPU and PSU out, and you be golden then (since you want to stick with i7's I believe). Seen Lenovo, Acer etc. as low as $549. If you go i5 instead (perfectly fine alternative) you can grab them around $400. Personally the other $150 to me makes all the forward investment.