Can anoyone explain this:

It should be the Elpida. After that the miner crashed, couldnt close the claymore miner window and when i wanted to restart system it hanged at the point where it should boot up, wouldnt reboot. Switched the psu power button off and on and then it started fine no problems at all.
Did you get a OpenGL call in the log files of claymore? The over clock might be to hard on that card.
Also when a gpu crashes like that it could lock up the system hard reset only way to get it back