I have three rigs with the ASRock motherboards and 3 7970s , They average about 48 hours of mining before they freeze up and I have to reboot them. Its just a frozen screen, I cant figure out what is going on. I have tried differant config settings turning of services and everything else I can think of. I run windows 7 and cgminer.
Any thoughts on what could be causing this? below is the exact items I use