Hey guys, i recently bought a brand spanking new HD4870 for my gaming comp, and after fixing the fan speed at 37% and watching my temps drop to the 45-50 degree range i thought i'd see how much overclocking headroom my card had. I opened up the CCC and told it to "auto-tune" my card and it clocked my card at 840/1180. Needless to say I was thrilled since without any serious tweaking I was able to clock it that high. So anyway I ran 3Dmark06 to see how the card ran at those clocks and got artifacts all over the place. I looked at my temps and the card wasn't even hitting 80 degrees during the benchmark, so now i come to you, oh wise ones for advice. Is the CCC a bad tool to use for overclocking or am I just doing something wrong?