I am looking to upgrade my computer for upcoming video games. I currently have a Intel 2 Quad Core 2.5Ghz(4 cpu's) 6gb of ram DDR2,ATI Radeon HD 5670. I would like to know what is a better upgrade for the current video card I have. Or, if it is worth the money purchasing a new video card($200-$300) for the current system that I have. Any advise would help! Thanks in advanced!