My 2nd ever Extreme Cooling run with Dry Ice. Beat my old result of 5900 MHZ. (Due to upgrading from AsRock 990fx Killer to ASRock 990FX Extreme9). Completed a cine-bench run at this speed at 1.75v (on single-core) but couldn't complete on multi-core. Reason was> during run temp would jump from -54c to -13c. Crashed at -13c (roughly) every time. I was measuring temps from socket on mobo. Bad mount or is this normal?