New PC random restart.

[Winterlight]

I build new PC about 2 month ago and have random restart problem without any BSOD. I investigate windows event viewer  and found that always same error appear on this random restart time. Btw that restart happen random and immediately without any signs or freeze and etc.

WHEA-Logger

A fatal hardware error has occurred.

Reported by component: Processor Core
Error Source: Machine Check Exception
Error Type: Cache Hierarchy Error
Processor APIC ID: 8

The details view of this entry contains further information.

Any idea what couse this error and how fix it ?

[NunoLava1998]

Based off of the specific error it's giving, it could be a number of things; however, it does indicate that something is probably wrong with your CPU or firmware. (It's definitely not an error on the software side, so reinstalling Windows probably won't help, unless it's driver-related)

 

Most of the time, this is caused by an unstable CPU; have you ever changed your CPU's voltage, frequency or FCLK in the past? If so, resetting it to normal settings should keep these errors from happening. If that doesn't work, you should try to update your motherboard's BIOS to the latest version, as it's also possible that your firmware could be causing these errors.

[Winterlight]

29 minutes ago, NunoLava1998 said:

Based off of the specific error it's giving, it could be a number of things; however, it does indicate that something is probably wrong with your CPU or firmware. (It's definitely not an error on the software side, so reinstalling Windows probably won't help, unless it's driver-related)

 

Most of the time, this is caused by an unstable CPU; have you ever changed your CPU's voltage, frequency or FCLK in the past? If so, resetting it to normal settings should keep these errors from happening. If that doesn't work, you should try to update your motherboard's BIOS to the latest version, as it's also possible that your firmware could be causing these errors.

Yes I do undervolt with PBO at max negative 30 value and it pass all stress test no crash in game as well no crash. Except one game that I still not understand if it's undervolt problem or borken game. Btw I very offten get error  STATUS_ACCESS_VIOLATION in chrome while watch Youtube not sure if can be as well due that ?

Another strange thing that CPU run all time 4 Ghz+ even at idle and default BIOS values. CPU voltage never drop below 1V

Btw I have Ryzen 5900X, 2 x 16 Gb RAM 3200 Mhz

[NunoLava1998]

1 minute ago, Winterlight said:

Yes I do undervolt with PBO at max negative 30 value and it pass all stress test no crash in game as well no crash. Except one game that I still not understand if it's undervolt problem or borken game. Btw I very offten get STATUS_ACCESS_VIOLATION in chrome while watch Youtube not sure if can be as well due that ?

That's likely what's causing it then; if you reset it to default settings (or up the voltage a bit), does it still crash?

From what I'm reading, that specific error seems to be browser related; it could be something like a broken browser extension.

[Winterlight]

1 minute ago, NunoLava1998 said:

That's likely what's causing it then; if you reset it to default settings (or up the voltage a bit), does it still crash?

From what I'm reading, that specific error seems to be browser related; it could be something like a broken browser extension.

I  try with lower value 25 but still restart time too time and I'm really not understand why one game keep crashing non stop coudl it be due CPU as well ? As I know if it be CPU fault whole OS crash not game only ?

[NunoLava1998]

5 minutes ago, Winterlight said:

I  try with lower value 25 but still restart time too time and I'm really not understand why one game keep crashing non stop coudl it be due CPU as well ? As I know if it be CPU fault whole OS crash not game only ?

The undervolt is probably still too low; try to see if it still crashes with default settings (no undervolt at all).

As for the game crash, it is possible for something like that to happen, it's just uncommon.

[Winterlight]

10 minutes ago, NunoLava1998 said:

The undervolt is probably still too low; try to see if it still crashes with default settings (no undervolt at all).

As for the game crash, it is possible for something like that to happen, it's just uncommon.

But I have poor cooler only 240 AIO at default it run hot  Even with PBO undervolt max value it hit ~70C

I will try now default but if it's right than I'm super unluckly couse I hear almost all Ryzen 5900X can do 30 value undervolt.

[NunoLava1998]

Just now, Winterlight said:

But I have poor cooler only 240 AIO at default it run hot

I mean, it does seem as if you're undervolting it by a lot; you can probably still undervolt it by a more reasonable amount, and it should work. If thermals are still too high, there are some tricks you can use (using more fans in your case, using higher quality thermal paste, changing your AIO's fan profile) that should be able to bring down your CPU's temperature by a couple degrees.

 

Either way, I'm only asking you to change it to default settings to see if it still crashes; you don't have to keep it that way.