I've been trying to OC this card, have done so now too. The GPU clock is now 690 and Memory 1103 Mhz. I have had no errors running my games (Cod4/mw2) but somehow my 3Dmark06 scores are lower than on my stock speeds. (OC: 12664 / Stock:12679). The difference isn't that big, but for that much of an OC you'd expect something in the 13K.
CPU: Q6600 @3Ghz Mobo: Maximus II Formula GPU: 4850 PSU: 750w Corsair
What do you guys think?
More about4850 lower 3dmark stock
It's just a benchmarking program; it has no affect whatsoever. If it performs fine in-game, I'd just leave it.
"Site note: Try underclocking it. See if you can hit 15k with an HD4850!"