Topic: cgminer splits hash rate between multiple GPUs (Read 877 times)
I should be running the latest version of cgminer, since I just cloned it from the git repository. I've tried setting the intensity manually to 5, but it just splits the hash rate more evenly. Any other thoughts?
Old versions of cgminer have been "splitting" hash rate between cards for me when I was using dynamic intensity. I've always kept it manually at 9.
I never had much luck with mixing 5xxx and 6xxx cards in one rig. For these cards, Catalyst 11.04/11.05 worked best for me with APP SDK version that is provided in drivers.
I never had much luck with mixing 5xxx and 6xxx cards in one rig. For these cards, Catalyst 11.04/11.05 worked best for me with APP SDK version that is provided in drivers.
I'm running cgminer on Ubuntu 12.04 with two 5830s and a 6800-based card. I installed everything according to this guide:
http://rdmsnippets.com/2013/03/20/bitcoin-mining-with-ubuntu-12-04-tls-and-cgminer/
If I mine on one card, it gets the full hash rate (200 Mh/s). However, if I mine on all three cards, each card only mines at 1/3 the rate it's supposed to get (68 Mh/s). This is apparently the problem described in the cgminer FAQ:
I used aticonfig to set up my xorg.conf file, so I don't see where I might have messed up my driver configuration. I've tried adding a dummy plug (well, a resistor) to one of my GPUs, but to no avail. Am I overlooking something? Where should I start looking for problems with the configuration?
Thanks!
http://rdmsnippets.com/2013/03/20/bitcoin-mining-with-ubuntu-12-04-tls-and-cgminer/
If I mine on one card, it gets the full hash rate (200 Mh/s). However, if I mine on all three cards, each card only mines at 1/3 the rate it's supposed to get (68 Mh/s). This is apparently the problem described in the cgminer FAQ:
Quote
Q: I have multiple GPUs and although many devices show up, it appears to be working only on one GPU splitting it up.
A: Your driver setup is failing to properly use the accessory GPUs. Your driver may be configured wrong or you have a driver version that needs a dummy
plug on all the GPUs that aren't connected to a monitor.
A: Your driver setup is failing to properly use the accessory GPUs. Your driver may be configured wrong or you have a driver version that needs a dummy
plug on all the GPUs that aren't connected to a monitor.
I used aticonfig to set up my xorg.conf file, so I don't see where I might have messed up my driver configuration. I've tried adding a dummy plug (well, a resistor) to one of my GPUs, but to no avail. Am I overlooking something? Where should I start looking for problems with the configuration?
Thanks!
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