My current system is very slow -- I'm running an Athlon model 3400 (single core) with an old PCI-E geforce 6600 series. I probably spent a couple hundred bucks upgrading it to that in 2006 and it was intended to be a stop-gap upgrade.
It plays WC3 and CS:S well, which are the only games I use it for, although i'm likely to upgrade sometime this year for more image work in Linux (I generate thousands of images per month).







