i remember about a year and a half ago when the rage128 from ati came out. You could get it running at 90/90, 75/75 , 103/103, or 100/110. Reactorcritical had the bioses for them all and you could just flash to whatever one you wanted and it worked. What was odd was if you used an overclocking utility to take a 75/75 one to 100/110 it wouldn't work, the memory would corrupt, so i figured the bios flash would change the memory timings. I'm assuming that maybe these radeons are the same. I know ATI didnt put heatsinks on the 75/75 and 90/90 rage128s, but for some reason i think its still the same for the radeon.