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Author Topic: Just installed HD6990 but I only see one GPU... advice requested  (Read 753 times)
sohum
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June 28, 2011, 04:21:57 PM
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I have been reading the forum for some time and also have been mining for a while.  I have one rig with four 6870s and another with two 5830s.  I decided to add a 6990 to my machine (personal use machine not a mining rig) but when I installed it I only see one of the GPUs for mining.  I am running Win7 with the latest Catalyst drivers (11.6 I think) and using poclbm for mining.

Has anyone run into this before?  After searching online for answers I have only seen one post describing the same situation and they claimed that updated drivers fixed their issue.  I wouldn't have purchased a 6990 if I was building another rig but bang for buck since I had my existing system with an open PCI-E slot it was a no brainer but right now it is only performing 340MH/s (I haven't overclocked it yet since I need to get the other GPU working first) which isn't much better than my 5830's that overclocked are doing 300-310MH/s and they only cost $109 compared to the 6990 at $700.  I am expecting 700-750MH/s once I figure this out. 

Any suggestions are much appreciated.
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September 21, 2011, 05:42:03 PM
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Have a look in this thread:
https://bitcointalk.org/index.php?topic=44639.0
Looks like you're having a similar situation.

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