Question "WHEA_UNCORRECTABLE_ERROR" BSOD when running 4 cores ?

Nov 30, 2024
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Motherboard: Asus Prime Z270-A
CPU: Intel i7-7700K

Running the i7700k with BIOS set to ALL cores boots fine but causes BSOD WHEA_UNCORRECTABLE_ERROR, after a few minutes of normal browsing, file open etc.

If I select 3 cores in the BIOS it runs great very stable, and fast. Never any BSODs.

All other settings in the BIOS are defaults, no over clocking, no tweaking at all.

Running the Intel Processor Diagnostic when 3 or 4 cores active says CPU 1 passes. Max temp when running is 78 degrees on CPU and 79 degrees on package and cores. Data from CPUID HWQ Monitor.

I have tower air cooler.

Any suggestions on how to get all 4 cores running and stable? I want to run DAW music software and plugins which are demanding.

Many thanks
Rocky A