Is there any tricks to cut down the Video Driver from crashing. Besides lower GPU Mhz.
I am asking because I have 3 machines identical in all ways brand new win7 installs 64bit, Sapphire 7870xt cards.
I can run 2 no issues at 1200Mhz GPU mining 525 mh/s while the 3rd one the video driver seems to crash above 1145Mhz after several hours.
The 2 at 1200 run at 71C and 76C while the driver crashing one runs at 75C.
Increasing core voltage helps to increase overclocking stability at the cost of increased heat production. Even with the same model, each GPU chip is different and has its own clock speed stability profile, so the fact that one out of your three is more touchy than the others is not to be unexpected. Since you can handle a few more degrees of thermal load before cooking your chips, I'd recommend boosting your voltage a bit and see if your temp stays below 85C. Let us know if your system likes is.