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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1038

post #10371 of 38701
Correct, afterburner will not always extend clocks for gpu2 in a crossfire config. ASUS GPU tweak will, however.
post #10372 of 38701
Quote:
Originally Posted by afadzil21 View Post

Don't. I regretted doing it with my 7970. The reference cooler was just too loud for my liking. Just fork out the little extra for the second DCII.
Ok thx.
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post #10373 of 38701
Quote:
Originally Posted by Evil Penguin View Post

I don't need the extended clock, I just wanted to understand what the command does and try it myself. 
I am pretty happy with 1070/1400 MHz. smile.gif
Above that and I dare certain people to run a certain test with a certain configuration and call their cards stable. wink.gif

why only 1400 for memory?
post #10374 of 38701
Two questions

1. What is the maximum voltage I should go up to on my memory for a reference Gigabyte 7970?
2. How do I stress test the GPU's memory? or does Kombuster work for that as well?

Currently at 1300/1525 on my card... watercooled, load temps of 46C after about 30 minutes of Kombuster... VRMs are showing 50C, which is nice and cool... once I'm done tweaking core, it'll be time to push the memory.
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post #10375 of 38701
Thread Starter 
Quote:
Originally Posted by dajez View Post


why only 1400 for memory?

Because I don't have a very concrete way of error checking/stressing the memory. 

Basically I don't like going in blind with overclocking. 

I need a way of checking for errors (effectively). 

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post #10376 of 38701
The best drivers I have used are from benchmark3d. Their 7900 modded drivers work perfect for me, much better then official drivers.
post #10377 of 38701
Quote:
Originally Posted by Evil Penguin View Post

Quote:
Originally Posted by dajez View Post

why only 1400 for memory?
Because I don't have a very concrete way of error checking/stressing the memory. 
Basically I don't like going in blind with overclocking. 
I need a way of checking for errors (effectively). 

OCCT has error checking.
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post #10378 of 38701
Thread Starter 
Quote:
Originally Posted by DaClownie View Post


OCCT has error checking.

Not for GPU memory (at least with AMD GPUs). 

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post #10379 of 38701
Quote:
Originally Posted by tsm106 View Post


-xcl is very much like racerx mod edited to run with AB using Official Overclock path. Essentially, it's a loophole that uses Overdrive to overclock with. You only use AB to pass the intended clocks to Overdrive. With the clock limits extended via the powerplay table reg hack. The point of this is to bypass UOM, in the case that UOM has an issue with the varying powerplay states, which it does depending on driver on single cards.
Ideally, we could overclock like we do on Cayman, ala Overdrive with Racerx extended clocks, using RBE for voltage control. AB's -xcl comes close but when you have to add in voltage, this can pose problems of infighting between Powerplay and AB. Powerplay has like 4 states and AB can only control two states.
If we had RBE support you could just edit the 3D state voltage and be done with it, like with Cayman. But no, some dufus decided to lock the bios hashes and do a driver check. rolleyes.gif

Sorry google translate doesn't seem to be working...

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post #10380 of 38701
Quote:
Originally Posted by xoleras View Post

Correct, afterburner will not always extend clocks for gpu2 in a crossfire config. ASUS GPU tweak will, however.

What are you talking about? AB has NEVER extended clocks using xcl on slave cards. It's a known limitation.... maybe one that not many know but known nonetheless.

Quote:
Originally Posted by chillgreg View Post

Sorry google translate doesn't seem to be working...

I thought that made perfect sense. nerdsmiley.png
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