Hey guys, I don't know how to make this V12 work, had no problem with any version before, my rig is 4x 280x with 2x 750W PSU so I got power, win7 x64, 4g ram, 40g swap file. I tried running from -i 6 to all the way to i 1 on 2 cards, (-i 4,4,1,1 now) and still the rig simply crashes, the gpu driver fails and restart. I'm trying for 3days but every day I wake up I see that it restarted, here's the bluescreen log.
http://imgur.com/a/mJFsGThere's nothing in the claymore log this time, previously the 3rd and 4th card failed, now I don't know which one, log doesn't say, simply stops.
edit: 15.12 drivers
This is what was happening to me as well. Something about the Atikmdag crashing, which i believe is the driver. So what i did is reinstall fresh driver after wiping old ones. Then run my cards without any kind of OC software running. Since then i am stable.