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Overclocking HD6950 2GB

post #1 of 11
Thread Starter 
So I just got a reference Sapphire HD6950. It's shader unlocked via custom BIOS, but the memory settings and stock clocks were left unchanged in BIOS to avoid the issues that can cause. But the voltage has been unlocked.

The previous owner said it can do well above 6970 speeds, but CCC caps it to 840MHz. I want to go for 900MHz at minimum. How do you bypass the CCC limit? Previous owner said something about Asus SmartDoctor, but when I run that it says "Nope, you don't have an Asus card, piss off."

How do I bypass the CCC limit?
post #2 of 11
MSI afterburner will do that.

I don't think CCC will.
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post #3 of 11
Thread Starter 
MSI Afterburner and RivaTuner won't work for some reason. :/
post #4 of 11
Do you have the right version of AB?

It's beta 2.1 or something. I'll check when I get home.

Only a certain version works with these cards, unless things have changed.

What about Trixx?
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post #5 of 11
Trixx works absolutely great for me.

Also Afterburner works great after unlocking voltage in the settings.
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post #6 of 11
Thread Starter 
Afterburner has the 840MHz limit too (originally I used the 2.2 beta which doesn't work at all, but 2.1 at least launches). Rivatuner acknowledges the card's existence but won't let me overclock. SmartDoctor complains that it isn't an Asus and shuts down.

I'll give Trixx a shot.
post #7 of 11
Thread Starter 
Trixx works. Thanks guys!
post #8 of 11
Trixx is best because you can also enable overdrive in CCC and keep power setting to +20% at the same time as using trixx to overclock.....my 6950 will only overclock to
900 / 1400 @ 1.15v....anything above 900 and it locks up!
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post #9 of 11
Thread Starter 
I've got it to the previous owner's setting of 900/1350.

The Witcher 2 at 1080p with EVERYTHING maxed except Ubersampling. Average ~58fps.
post #10 of 11
is that at stock voltages too? If so, fantastic!

Yep the 6950 is a powerful little card. I can max everything out, most games will run at about 70 - 120fps!

I'd LOVE to get another for crossifre but expensive upgrade for me as i'd need new PSU, case, motherboard first!!

What card did you upgrade from?
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