A friend of mine was gracious enough to give me his pc and I would like to upgrade the graphics card in it. He had it a few years and so have I, now I'm in a position to put some money into it. At moment its still running the dual 9500GTs he installed but he recommended the GTX 460 if I was to upgrade it. I'm not tech savvy and so am at a loss. I believe the PSU has a max output of 750W and I have a budget between £100 - £200. Any advice would be greatly appreciated. I can't afford a new system so am trying to make do with what I have at the moment.