Since my 4870 is starting to show its age in many new games, I've decided to try to squeeze out a few more FPS via some mild overclocking. I've never done this before and don't know much about it so I need some help. Here's my card. It's the IceQ version but I think the cooler is the reference model. It says "4+ Turbo" on the box, referring to the 4GHz memory clock that it's supposed to have but it's only at 1GHz and I don't even think they go that high so I'm not sure what's up with that. Anyways, it runs from 68-75C even under load with the fan on auto. Oh, and I'm using the new 10.3a drivers. So I opened up ATI Overdrive in CCC, unlocked it, and cranked everything up figuring these weren't drastic increases and that this is a limited tool. I haven't seen any option to go higher than 790/1100 so I guess I'm right. Anyways, I ran the Just Cause 2 benchmark before OC'ing and got 51.01. After OC'ing I got 52.38. It's a very small difference but I was watching my temps and they were exactly the same as stock, so I figured why not leave it overclocked. Next, I played some BC2 and whattayaknow: Getting artifacts and model glitches up the bum I decided to do some more intensive stress testing. I used the stresser in Overdrive before I did the JC2 benchmark and it passed with no strange temps or errors. Here's the testing: As you can see in the second one, Furmark was showing some outrageous clocks. It would display the correct 790/1100 then hop to 5177/7208. You can also see GPU-Z displaying those high clocks over in the corner. Questions What's up with the "4+ Turbo"? Why were the clocks going from 790/1100 to 5177/7208? What do you think caused the BC2 craziness? Should I change anything? What program would one use to overclock to higher levels than what Overdrive allows?