I got the same issue on msi-gd65 was after about an hour and a half full pot...maybe something around the socket is getting too cold after some amount of time.
^ I will today
max chip runs right now is gene volts maxed out (still scaling) 1.92v set = 1.94 and runs 6527 max superpi1m and pifast, max cpu-z is 6568mhz and wprimes nothing special. Max 06 cpu test 6275mhz.