How does the Opteron compare with the Athlon64 FX in terms of gaming performance? The Opteron 2.0Ghz is comparable in price to the Athlon64 FX, which is 1.6Ghz, and the Opteron 1.8Ghz is significantly cheaper. I also use PCI-X slots. I'm thinking of getting one of the Tyan dual-Opteron motherboards with AGP and PCI-X and just getting one Opteron CPU (which I know I can do). However, I would like to hear some people's thoughts as to how the Opteron compares with the Athlon64 FX.