Overclocking the XFX 9800GX2 was fairly simple. Just keep ratcheting up the clocks and the scores keep going up. I figured with a core speed of 600MHz I might be able to push to 700MHz. I went well beyond that and hit 768MHz, a 168MHz improvement over stock. The memory scaled very nicely as well, reaching 1106MHz, or 206MHz over the stock settings. The shader clocks scaled along with the core and ended up at 1944MHz. All things told, I was amazed at the increases in the clock speeds. The overclocked scores in this review do not tell all of the story.