Some people who demand the absolute best performance, want a little more than the stock 850MHz core speed reference HD5870's offer. Overclocking is a chancy business and often voids your warranty. We often see video cards with a paltry 25 - 50 MHz overclock hocked as OC models of various flavors. It's not often we see a GPU with a full 100MHz factory overclock.Even less often do we see a 100MHz core overclock GPU with Dual inclined fans and an overclock utility like OC Guru that allows you to not only overclock but add up to 0.1v so you can overclock beyond the 950MHz speed the Gigabyte HD5870 Super Overclock offers from the factory. Yes you read it right, 950MHz Core Speed, dual inclined fans, Gauntlet Sorting on the Core, Samsung or Hynix Tier one memory, and OC Guru with Voltage control. It just doesn't get any better than this for the 5870 series.