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[Solved] Crossfired 6950's waiting to start after update - Page 5

post #41 of 50
Thread Starter 
Quote:
Originally Posted by EyesDilated View Post

I had the same problem with 12.6 and 12.7 where the clocks ran at 250/150 on one of my 6950s
Going back to 12.4 fixed the issue

Good to know for future reference. started running POEM instead of MOO! and the PPD isn't as much. Might need to go to 12.4 to run MOO! for the BgB.
Quote:
Originally Posted by eus105454 View Post

Warning: Spoiler! (Click to show)
I'm using Gamer's same app_info file on my sig rig. But don't you need to modify it for a 2 gpu setup? In other words, don't you need to specify that you want to run "X" number of instances on card 1 and "Y" number of instances on card 2?

I did not edit the file for it to specify what to run on each card, you will have to ask someone much smarter than me on that one.
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post #42 of 50
Quote:
Originally Posted by eus105454 View Post

Warning: Spoiler! (Click to show)
I'm using Gamer's same app_info file on my sig rig. But don't you need to modify it for a 2 gpu setup? In other words, don't you need to specify that you want to run "X" number of instances on card 1 and "Y" number of instances on card 2?

You can not define different parameters for two cards that are same type, Ati or Nvidia. Both run same number of tasks simultaneously. If you have mixed Ati and Nvidia cards then both can have their own parameters.
post #43 of 50
Quote:
Originally Posted by tjr2121 View Post

4 per card
Any ideas on what the this does??
Code:
<flops>

75 minutes for task is pretty slow for 6950 running 4 tasks at a time, my 6870's make same number of tasks in 45 minutes. I think your cpu is not quite fast enough to keep those cards running at full speed.
post #44 of 50
Thread Starter 
screenshot4vk.jpg

AMD FX-6100 with a slight overclock to 4.0GHz.I have adjusted the coproc number up and down from 0.50 and it only ran less units at the time. I would love to get it down to 45 minutes. biggrin.gif
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post #45 of 50
Thread Starter 
After a little investigating with MSI Afterburner each GPU is only running at ~55%. Tweaking the app_info to try to correct that now. Will update.
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post #46 of 50
To give you an idea about what kind of cpu power you need to run those 6950's here is a screenshot of my lightly overclocked i7-920 running 6870's. As you can see it's not enough to run those cards at full utilization and 6950's need a lot more from cpu than 6870's. I used those 6870's in i7-2600K system before and overclocked to 4.5 it was able to push utilization to constant 99%.

post #47 of 50
Thread Starter 
So I need to bump up the overclock. Thanks for the info.
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post #48 of 50
6950 is probably quite similar to 5870 and to keep even one of them running at 96 % utilization I need to push i5-2500K to 4.7 GHz

post #49 of 50
Thread Starter 
upped the overclock to 4.5 GHz and the usage increased to ~60% each. Going to let it run 1 complete unit like that to check times and then remove 1 card and see what happens. This is so much fun. biggrin.gif

screenshot5jb.jpg
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post #50 of 50
Thread Starter 
So my 4.5GHz overclock wasn't quite as stable as it needed to be and had to be slightly backed down to 4.4 GHz. biggrin.gif But it ran long enough to show me that the cpu is bottlenecking the gpu's. I have played with the number of units running and the number of cores for each unit in the app_info file and pretty much discovered that it I had it where it needed to be all along. I can get it more efficient with times or gpu usage but the PPD would decrease. All I have changed since the start of this thread is rolled the drivers back to 12.4 (got the clocks on the 2nd card back up to where they should be), upped the overclock from 4.0 to 4.4 GHz and changed from moo wrapper to poem at home I could make more points with moo but I like what poem is trying to do. Thanks to all who replied here and if you know of anything I have missed let me know.

ps. I did change the thermal paste on 1 card so I no longer need a desk fan to keep it under 100c. biggrin.gif
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Hard DriveOptical DriveCoolingOS
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