Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
Sorry, I've not explained it very well. The PC is used for some gaming, things like GTA 3 and Farcry 2. The 8600GT played them well enough but seems to have died, so just using onboard graphics at the minute. So need something that will play those games and ideally Nvidia so I don't have to change drivers etc.