These cards are great for over clocking, if you have a powercolour HD 6850 they come with a buety of a fan for over clocking. I have over clock my HD 6850 from 775 mhz up to 810mhz, this had made my performence improve alot without the worry of a temp change, i stress tested for about 4 hours and temp stays around the 76-82 degrees marks, and for just having fan cooling these temps are fine.
yeh ive cranked it up to 850mhz/1050 after all these posts hehe, im just playing it safe either way its alot better then its stock 775mhz and the temps are still fine
i have a saphire radeon 6850 and I can't overclock. Going a little high causes my computer to crash wtf1che3zeman1
GPUs are just like CPUs. Just because someone has the same make/model that you do and they can OC their product well, doesn't mean yours will do the same. I used to run two 8800 GTS 512MB cards in SLI. Individually I could push the clocks up around 100Mhz on one card and only about 30MHz on the other card - same make/model (without adjusting voltage).
I can get my GTX 570 to 900/1800/2050 with the voltage at 1.075. I've seen others reporting around 950/1900/2100 with same voltage. Sometimes you get a good overclocking GPU and sometimes you don't.
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