With your system the 32mb GTS would be a little faster in most games especially at 16bit and also sometimes at 32bit so get that. If you had a 900mhz CPU I might advise you to get the Kyro II 64mb as it would then probably be faster in most games then that 32mb GTS especially at 32bit. But really you'll be happy with either card, if you only like 32bit and also like FSAA and are keeping that CPU then flip a coin to decide which card If you like 32bit and your getting a new 900-1ghz CPU then get the Kyro II.