Hello 

Since a year I have a Z370 classified, it's a great card and I'm happy, my CPU (i7 8086k) has always been OC and stable at 5.2Ghz for 1.35v since I have the card, but since 2 or 3 weeks I have random BSOD.

-I thought about the ram so I tested 2 kits.

-RAM EVGA SSC 3200 Mhz = BSOD

-RAM GSKILL Z TRIDENT 3200 Mhz = BSOD

-I tested the two kits on a friend's PC and 0 BSOD, so it's not the RAM.

-I tested different version of bios = BSOD

-I have reinstalled windows 10 several times with different USB key = BSOD

-No abnormal warning LED is lit on the motherboard.

Do you have an idea where it can come from? would the card be Hs?

The 4 last crashes:

Error:
file path: C:\Windows\system32\drivers\intelppm.sys
product:
company:
description: Processor Device Driver


Error:
file path: C:\Windows\system32\ntoskrnl.exe
product:
company:
description: NT Kernel & System


Error:
file path: C:\Windows\system32\ntoskrnl.exe
product:
company:
description: NT Kernel & System

Error:
file path: C:\Windows\system32\ntoskrnl.exe
product:
company:
description: NT Kernel & System

The ram just run on XMP, no manual overclock on it and with stock CPU is BSOD too, 
I was stressing the CPU all night with OCCT at 5.2 and no crash and did not exceed 67 ° c

I stress the CPU for 7 hours stock and 7 hours OC has 5.2 Ghz with stock ram on OCCT, i have no crash and no error, I think it's ram ports that are defective, I will try another CPU in the day, I will activate the XMP and see what happens

the XMP has been stable for 1 year ..: / I checked last night the socket everything is good, the same for the bottom of the CPU nothing weird The cpu works well on my 390 Dark

No it has always been oc at 5.2 Ghz for 1.35v for 1 year and never had problems, the oc is stable, it is also on my 390 dark and it can go down to 1.335 with

That is okay it your decision! is your vdroop disable?
Yes it exactly same to my MB was 1.325 at 5.0ghz it crash BSOD after few weeks so I try push up bit more to 1.340 so it stable charm....had test 5.225ghz at 1.340v it crash so test push up to 1.365v it stable.
I test try reach at 5.3ghz voltage at 1.385v but I have not test stress yet need to test first for no BSOD...  

The processor worked 7h under OCCT without worries or BSOD If he was the cause he would have bsod seen the long time not?

I have check the windows event and no code 17/18 or 19 but i have 710 events, it's a lot you think  ?
I gonna test all my SSD this night 

Willbackfr
"Forget to tell ya that my CPU had delid and relid for Thermal Grizzly Conductonaut Liquid Metal. it so much better...."

sure, i have gain 15/20°c with liquid métal ^^ 

yeah sure let us know and if you try push 1.365 and test to see how it go? but up to you 

Willbackfr

I can try but I'm sure he does not need it, because he is stable on big stress test and loop run cinebench R15 on 2 motherboards
He even made the best score I've ever done for 5.2 x'D

I can understand that don't blame you but what is your temp when full stress?

Willbackfr
72°c after 7h of stress and ~65°c in random run and 50/60°c in game

same here lol 
very good temp 

I take 1.37v for 5.3 and i stable for gaming and firestrike but not on cinebench, he need 1.4v for full stability on the classified K, but need 1.38v for full stability at 5.3 on the dark, this MB is awesome

Yes the classified is really good MB for sure, but the dark 390 dark is just.. i have no words xD 

The VRM do a huge job on it

Yes it's an import from usa, so difficult to find in UE :/

Yes i do this late :) 

UPDATE:
After a week of testing in normal use, I use the stock CPU with the ram stock and no BSOD for 2 days, so I pass the oc on the CPU at 5.2 Ghz and ram stock for 5 days no BSOD, tonight I reactivate the XMP but has 3000 Mhz and not 3200 Mhz as the rams are normally and I'll see what happens

Willbackfr
Yes i do this late :) 

UPDATE:
After a week of testing in normal use, I use the stock CPU with the ram stock and no BSOD for 2 days, so I pass the oc on the CPU at 5.2 Ghz and ram stock for 5 days no BSOD, tonight I reactivate the XMP but has 3000 Mhz and not 3200 Mhz as the rams are normally and I'll see what happens

Looks good - keep testing