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Average Radeon 6850 OC?

I had mine running at 950mhz, and I think I could have gotten more out of it (without bumping the voltage).
 
Mine is currently at 950/1250 without bumping voltage, and I think it can go higher. Temps have yet to get above 56º and fan is @ ~60%
 
You can OC using the CCC (Catalyst Control Center) - which is the AMD default utility, although the OC in the CCC is generally limited by the card bios.

For example my 6850 can only go to 875MHz core on the CCC, don't remember the memory limit. You just click the key symbol to unlock overclocking, move the slide bar to what level you want ant press apply. Mine is running at 875/1200.

If you want to go higher you use an utility called MSI Afterburner, that let you surpass the CCC limits. 900-950 core on 6850 without voltage shouldn't be hard to achieve at stock voltage. Adding voltage might allow you to go higher.

It can increase the speed of games somewhat, depends on the game and such and such. A 6850 @950/1100 should be quite close to a 6870 performance.

The downside is increased heat and power consumption. I would be careful OCing with that OEM PSU that came with your PC.

This a review of 6850 OC'ing and its impact in some games. It also talks about using MSI afterburner.
 
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Well, that is YMMV bit...

And that is why companies don't actually release cards at those stocks, cause a portion of them wouldn't be stable.

Some will be very good though, since it isn't economically feasible to test all individual products.
 
My sapphire HD 6850 did 930/1150 easily with a tiny voltage bump. It's basically the same chip as an HD 6870(Stock 900/1000) with lower clocks and less shaders.
 
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