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Removing sound card increased PPD! - Page 2

post #11 of 21
Quote:
Originally Posted by one-shot View Post

Did you put the sound card back in to see if the points return to the previous level?
Let's be rational and not jump to conclusions until we have more information.

You're no fun.
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post #12 of 21
ANARCHY

DEATH TO CREATIVE
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post #13 of 21
Quote:
Originally Posted by RockThePylon View Post

ANARCHY
DEATH TO CREATIVE

After we burned their offices and drug them out into the street for a good flogging for messing up our BOINC........ OH BTW, my antivirus client was running and caused the lower GFLOPS.
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post #14 of 21
Quote:
Originally Posted by granno21 View Post

Does having two pci-e x16 vs two pci-e x8 have an effect on ppd?

It did for me ! I now have 3 x 16 slots and see little reduction in output, per card, as compared to a pair of cards in a different system providing only x8 to each card..

HTH

dunx
Edited by 2002dunx - 12/13/11 at 1:38pm
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post #15 of 21
Quote:
Originally Posted by magic8192 View Post

You're no fun.

Thanks biggrin.gif
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post #16 of 21
Quote:
Originally Posted by magic8192 View Post

After we burned their offices and drug them out into the street for a good flogging for messing up our BOINC........ OH BTW, my antivirus client was running and caused the lower GFLOPS.

for your GPU?? That's odd, I would have expected the CPU perhaps, but to slow down your GPU production, that doesn't seem right. How much did it affect your production, I just let mine run whenever it wants and I don't really see much of a production differential.
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post #17 of 21
Quote:
Originally Posted by b3machi7ke View Post

for your GPU?? That's odd, I would have expected the CPU perhaps, but to slow down your GPU production, that doesn't seem right. How much did it affect your production, I just let mine run whenever it wants and I don't really see much of a production differential.

eeeehhhhh, yea, you are probably right.
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post #18 of 21
Quote:
Originally Posted by b3machi7ke View Post

for your GPU?? That's odd, I would have expected the CPU perhaps, but to slow down your GPU production, that doesn't seem right. How much did it affect your production, I just let mine run whenever it wants and I don't really see much of a production differential.

Well, the OP didn't put the sound card back in to show if the change in PPD was actually caused by the sound card. Consider this not linked to the sound card until valid testing proves otherwise.

Well done, OP. That's very interesting that a sound card could decrease your PPD to the extent. I wonder if the cause is shared PCIe bandwidth or some other system limitation.
Edited by one-shot - 12/13/11 at 3:18pm
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post #19 of 21
Thread Starter 
I put it back in. The GFLOPS returned to where they were before (there about). I forgot I didn't take a screenshot before I put it back in though...*sigh*

I'll update the post when I can be bothered with the hassle of restarting it :/

479
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post #20 of 21
What you are doing is correct, but be advised there seems to be many little bugs in Linux and Windows BOINC Client versions... One of the things is the Linux vs. Windows versions report very differently as to the compute capabilities of CPU's and GPU's... at least Ubuntu 11.xx vs. Windows-7. Properties can also vary greatly project to project and xxxx GFlops is not very accurate either. Heck, running FreeHAL or WuProp degrades performance slightly... any little thing.

Also, looks like your screen shot is from Moo! Wrapper. The drivers for the HD6970/90 are different than yours, so one has to ask if you are running BOINC with a core free for each GPU or not. On the HD6990 (for sure) and other ATI cards (I am told), it is required to free up one CPU core/thread per GPU. If you do not do that, the GPU can't be updated fast enough and performance will be erratic. Also, using MSI AfterBurner, you can monitor the GPU utilization much more closely and tune your system to max GPU performance should that be your goal.

I also have a 955BE box, it is running 3.8GHz on air with the HD6990 also on air. It does not require freeing up CPU cores while running Milkyway or Collatz, but it did require running only 50% CPU's when running DnetC and Moo! Wrapper. I also use MSI AfterBurner to monitor/tune the system.

If the update to the GPU is marginal, any other load, even a sound card would degrade performance... perhaps very significantly.

biggrin.gif
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