How well are everyone's 4870s overclocking? I just got mine from the egg today, and I'm pretty impressed. I had to increase the idle fan speed, as it was idling ~71c, but it's hardly noticeable @35%, and dropped the idle temp to 44c.
I've tried out both catalyst 8.8 and 8.9 on it so far; 8.9 seems like quite an improvement. I used catalyst to OC it to 790mhz gpu and 1100mhz memory, and put it through the paces. With the fan turned up abit, the temps still aren't breaking 60c. Is there another program that will let me push it a little farther? Rivatuner doesn't recognize it, and I've used Nvidia cards for a while before this. I'd like to see how far I can push a single card. The egg had them for $195 last week; I would've bought two, but it would have meant a new psu.