Sierra strange system freezing

[MICKHAEL]

well, from Sierra 10.12.2 to 10.12.4 my system is randomly freezing. no post. no error. nothing. no warning, just locks up. Mouse doesnt move, graphics freeze. sound repeats

any idea?

 

system
AsRock x99m Extreme 4

Intel® Core™ i7-6800K Processor 15M Cache, up to 3.60 GHz

Gigabyte GTX960 GV-N960IXOC-2GD

HyperX FURY Black 8GB, DDR4, 2400MHz, CL15, 1.2V *2

Solid State Drive (SSD) Intel 600p Series, 256GB, M.2 80mm, PCIe

Corsair VS550 550W

[PPCnostalgic]

Hello. Does AppleHPET.kext load properly? You can check it in about this Mac>system report>extensions, you should see "yes" if loaded. 

[MICKHAEL]

Hello. Does AppleHPET.kext load properly? You can check it in about this Mac>system report>extensions, you should see "yes" if loaded.

Will check after memtest) and yes, just checked HPET is loaded...

[MICKHAEL]

well, I found how to manage the freezing.
PS: not so stable afterall...

[Fergarth]

It happened to me precisely the same. From the moment I overclocked the processor and memory, it never happened again.
Yes in my case I also think it had to do with the frequency of memory. Now my Ram is working with the native frequency and before was with a much lower freq 

[MICKHAEL]

so, after all, in this 4 channel mainboard, for dual channel we need to utilize 1 and 3 slot. in 1 - 2 constantly freezing. strange