5950X F4-3600C14Q-64GTRS - Random Reboots - WHEA Errors

[BigA]

I just upgraded from F4-3600C16Q-32GTZN to F4-3600C14Q-64GTRS modules and I started having random reboots with the below error in the event log. I have XMP enabled and PBO set to auto. I have been running MemTest for a few hours now (16 threads X 3634 MB) without any errors. I have a Gigabyte X570 AORUS XTREME (rev 1.2) with the latest BIOS. I have CPU Core manually set to 1.20 V, but other than that, not too many other changes besides for enabling virtualization.

A fatal hardware error has occurred.

Reported by component: Processor Core
Error Source: Machine Check Exception
Error Type: Cache Hierarchy Error
Processor APIC ID: 7

Please let me know if you need more information.

[GSKILL TECH]

Try a lower DRAM Frequency to see if it can be more stable. If it can, check CPU SoC Voltage, then manually set it higher to see if you can improve stability. In case a lower DRAM Frequency is unstable as well, you may need to try two or one module at a time to see if a stick may be bad and causing problems.

[BigA]

Try a lower DRAM Frequency to see if it can be more stable. If it can, check CPU SoC Voltage, then manually set it higher to see if you can improve stability. In case a lower DRAM Frequency is unstable as well, you may need to try two or one module at a time to see if a stick may be bad and causing problems.

Thanks. Both the CPU Core and SoC were set to 1.200v, but I noticed the motherboard was reporting around 1.180v, so I bumped both to 1.225v and then now they fluctuate between 1.200-1212v, so I will run some tests with the higher voltages and see if it remain stable. CPU idle is around 50C, so not too bad.

Also, do you have a recommendation for settings with MemTestPro?

[GSKILL TECH]

There is a maximum for each instance so you can set to that until the sum of all is near total capacity.

[BigA]

There is a maximum for each instance so you can set to that until the sum of all is near total capacity.

Thanks. I also noticed this happened when my PC was idle and not doing much (where MemTest runs for hours without issue), so I also made some changes to power settings in the BIOS. I will run Prime95 over the weekend to verify everything is good too.

Power Down Mode: Disabled
C-States: Disabled
SoC/Uncore OC Mode: (was Enabled already)

[GSKILL TECH]

Also try a lower DRAM Frequency to see what can be stable. This may provide insight to whether it is a setting issue or defective hardware since eg. DDR4-3200 should be stable without any additional adjustments for that system.