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Running both GPUs possible?

post #1 of 31
Thread Starter 
I have a 5770 and 5750 in CF

I run the first GPU in F@H and my CPU, and I'm wondering if its possible to get both GPUs folding with 2 clients running?

Also what program can I run to figure out my PPD for my machine?

Thanks guys!
 
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post #2 of 31
It's in the essential thread list. I'm on my iPad but hold on.

http://www.overclock.net/folding-hom...gpu2-gpu3.html
Edited by Psykhotic - 10/3/11 at 12:10pm
post #3 of 31
Thread Starter 
Thanks man! Found lots of good stuff in there, so much for not reading the essential thread *facepalm*
 
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post #4 of 31
ATi cards are known for lower ppd in folding. It's improved a little, but don't expect a lot from them. I'm thinking maybe 4-5k ppd each (others may know better, chime in here).

The reason I mention that is, if you are both CPU and GPU folding, you'll need to seriously check out what your best folding combination is for ppd (hey more ppd=more folding, and that's where it's at). You will most likely need to dedicate a core of that 955 to your GPUs if they are both folding or you'll throttle them. That cuts your CPU folding down to only 3 cores. Find out first what your PPD is on 4 cores, then on 4 cores with one GPU, then 3 cores with both GPUs. Sometimes, you'll do more folding on less hardware.
post #5 of 31
Thread Starter 
Quote:
Originally Posted by sstnt View Post
ATi cards are known for lower ppd in folding. It's improved a little, but don't expect a lot from them. I'm thinking maybe 4-5k ppd each (others may know better, chime in here).

The reason I mention that is, if you are both CPU and GPU folding, you'll need to seriously check out what your best folding combination is for ppd (hey more ppd=more folding, and that's where it's at). You will most likely need to dedicate a core of that 955 to your GPUs if they are both folding or you'll throttle them. That cuts your CPU folding down to only 3 cores. Find out first what your PPD is on 4 cores, then on 4 cores with one GPU, then 3 cores with both GPUs. Sometimes, you'll do more folding on less hardware.
Interesting, never thought of that... and gonna be honest I understand about 75% of it, not sure on the rest of it.

I know ATi's have always been slow folders, I am tempted to build another rig I have sitting around with a 9800GTX+ I could buy off Ebay but what do you mean by dedicated core? I have never heard of doing that...
 
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post #6 of 31
It means that a whole core will be stuck running the GPU. When I was folding with my 6870 my CPU was dedicating nearly 13% of its processing power to the GPU!
post #7 of 31
Thread Starter 
Does it unlock the core when its not folding?? Im so confused on how this works
 
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post #8 of 31
Doesn't F@H only use un-used clock cycles anyway?

Doesn't that mean that if the GPUs are requiring CPU, F@H's CPU thread will release the necessary amount to the GPU? That might cut into his CPU folding, but Phenom II's don't put up amazing numbers anyway.
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post #9 of 31
Yes. It allocates. But SMP does higher PPD. Which is why I stopped GPU folding and went back to bigadv. Also my GPU fan is incredibly annoying.
post #10 of 31
Quote:
Originally Posted by Psykhotic View Post
Yes. It allocates. But SMP does higher PPD. Which is why I stopped GPU folding and went back to bigadv. Also my GPU fan is incredibly annoying.
I don't think that SMP on an X4 will outdo his graphics cards. In your case, with a 2600K, you would for sure.
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