"One thing the XFX 9800GTX does really well is overclock. Finding the highest GPU core and memory clocks individually results in higher clock speeds, but the idea is to find the area where the two work well together and don't crash the application and driver. 842MHz on the GPU core and 1280MHz on the memory with the shader clocks just a hair over 2100MHz results in a nice performance boost. Overclocking the GPU core while leaving the memory at the stock 1100MHz resulted in a core clock speed of 862MHz. Overclocking the memory with the GPU core clock at the stock 675MHz resulted in a memory clock speed of 1288MHz. Unfortunately, I could not manage to boost both clockspeeds to their independent maximums. But the final results are more than I was expecting after the 8800GTs that I have worked with."