I am about to mod the bios on my 9800PRO and add a AC Silencer 1 (Rev 2) cooling solution plus OZ Cu ram heatsinks. But I have made an observation about two XT retail cards on the market that pose an overclocking conundrum. The cards are the GeCube 9800XT and the VisionTech 9800XT. The cards I am referring to both have Samsung 2.8 ns,128 meg ram. If you look at the bios section of PowerUp, you will notice that both of these cards have overclocked cores at 500 MHZ! How is that possible?? I've looked online at the Visiontek card and it does have two large cooling fans and a very large copper heatsink. But I doubt there are ram sinks on the backside of the card. I also know that the XT bios has improved memory timings; I used Rabit to view them in comparison to my PRO card. So how do they get 500 MHZ? I think both companies have found they can overclock the core and achieve very high fps while meeting the thermal thresholds of the card with their non-watercooled cooling solution. They use heavy duty heatsinks and fans and underclock the ram! I think the key is what they are doing to the clock on the Samsung ram. If you look again at the PowerUp bios section you will see that the GeCube ram is underclocked to 325 MHZ and the Visiontek ram is underclocked to 300 MHZ, while the ATI default is 365 MHZ.