My brother has a spare graphics card he wants to give me. It's a ATI HD5770. In my machine I currently have a Nvidia GT520 Silent. So my question if I switch my nvidia card for his ati card what driver should I use with it? The catalyst driver or the open source ati driver? I game on my machine quite a bit through wine (wow, bioshock, bioshock 2). Which driver would give me the best performance with games, I assume the catalyst driver would be best? I'm running Arch Linux 64 bit by the way.