my two mining rigs were running flawless for two weeks but lately it occurs more and more frequent that two workers for always the same GPUs just stop hashing. The console kind of freezes with the last Mh/s rate it was working with, but the cursor at the end of the line is still flashing.
This is how it looks like:
What makes me wonder is why the GPU usage of the other cards goes down as well when the third card fails. Afterburner updating interval is set to 10 seconds and I can see this usage drop on the other cards in the graph every time, so it must take at least some seconds.
I'm using win7/x86, ATI 11.6 + APP 2.4, phoenix miner with phatk kernel, settings: -k phatk DEVICE=2 VECTORS BFI_INT WORKSIZE=256 AGGRESSION=12 FASTLOOP
I also altered the phatk kernel with the formula given in this forum to improve the hash rate. I had some issues with this on our first machine, one miner chrashed the same way every two minutes with this change, but it also happened once just before I made the change so the issue is not cause by this but it makes it more likely to occur.
Anyone knows what is causing this behaviour?