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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1181

post #11801 of 38701
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Quote:
Originally Posted by mmstick View Post

Why don't we all use our graphics cards in the OpenCL capable POEM@Home project when not gaming (or even while gaming)?
I'm running it currently and getting a whopping 480,000 PPD with my HD 7950 at 55% utilization, with some HD6850s that my family uses producing a good amount of PPD alongside of that. If every HD79x0 owner was to suddenly start using their graphics card for something useful to scientific research there would be some major breakthroughs at record speeds. There doesn't seem to be very many people currently using the project, though it is steadily rising in users recently with its OpenCL release, but it is sad that I can say I'm ranked 15th in the entire US currently.
I would like to know how some users with RAM faster than 2000MHz perform in this project since it is very reliant on memory speed when it comes to graphics card utilization, until they make a nice GCN app that offloads more instructions onto the GPU instead of CPU.
Folding@Home still isn't very helpful with the AMD side of things, but you will find that AMD cards shine here in OpenCL BOINC projects a lot better than NVIDIA does, especially considering my 7950 has 4400 SP GFLOPS with a nice 1200MHz core and 1700MHz memory.
If you need a guide I wrote a nice one here:
http://www.amdusers.com/forum/showthread.php?8356-All-Encompassing-Guide-to-POEM
More projects will be porting to OpenCL GPU+CPU based processing in the near future, such as Help Conquer Cancer and GPUGrid.net.

My main issue with both projects is that they are not very efficient. 

Both use up quite a bit of CPU time and have very low GPU utilization. 

POEM@home at least assigns WUs not simply to keep "ATi" users busy *cough* F@h *cough*, but to get actual scientific work done. 

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post #11802 of 38701
Man, OCCT is great at testing the one GPU... too bad it won't do two... I got errors right away using clocks I knew didn't work and got no errors with ones I knew worked.

Edit: I maxed the voltage out and I get one error on OCCT after like 4 minutes, with 1175 core. So I guess that means I've hit my wall right around there for my core... frown.gif
Edited by Derko1 - 6/9/12 at 11:49am
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post #11803 of 38701
Ok, what about the RAM? I am at 1700Mhz stable so far. Is this safe/normal?
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post #11804 of 38701
Quote:
Originally Posted by BradleyW View Post

Ok, what about the RAM? I am at 1700Mhz stable so far. Is this safe/normal?

lol so am I... since I found my wall on the core, I'm just going up with the memory.
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post #11805 of 38701
Quote:
Originally Posted by BradleyW View Post

Ok, what about the RAM? I am at 1700Mhz stable so far. Is this safe/normal?

Yep its perfectly safe I'm running my VRAM at 1700 as well... VRAM overclocking is tricky as you have error correction so it will not artifact until it's badly unstable.

I checked for stability in multiple heaven runs where I compared my scores to previous runs. When your clock boost doesn't net you a jump in performance you are preety much in error correction territorry biggrin.gif

Not that this card needs a high VRAM clock as it has insane ammount of memory bandwidth XD
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post #11806 of 38701
Cheers!
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post #11807 of 38701
1172/1725 with 1.225v. I think that may be my limit... I will test for the next few hours and see stability, but I'm pretty confident that's my max.

http://3dmark.com/3dm11/3619255 P15908 with those clocks. I'm sure that with the 12.6 drivers I could hit 17k. They boost my score up by a bit over 1k, but give me issues with the sound.

Thanks for everyone's advise! thumb.gif
Edited by Derko1 - 6/9/12 at 12:45pm
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post #11808 of 38701
Now my GPU 1 will only apply my OC? And i have 99 usage on GPU 1 and 80 on GPU 2 now?
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post #11809 of 38701
Quote:
Originally Posted by BradleyW View Post

Now my GPU 1 will only apply my OC? And i have 99 usage on GPU 1 and 80 on GPU 2 now?

Sorry man can't help here I'm only running single gpu at the moment .....
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post #11810 of 38701
It has only started since overclocking the VRAM.
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