EZRanchero, Thank you for posting in the Intel® Communities Support.
Just to let you know, we only provide support in English language and currently, we are using a translation tool.
For this scenario, it is important to mention that the proper memory RAM for the Intel® Core™ i5-12400F is: Up to DDR5 4800 MT/s / Up to DDR4 3200 MT/s:
https://ark.intel.com/content/www/us/en/ark/products/134587/intel-core-i512400f-processor-18m-cache-up-to-4-40-ghz.html
You mentioned you are using ram ddr4 3600hz and that could be a little bit higher than what the processor supports which may cause instability in the system. Do you have the option of using DDR4 3200 MT/s? If you do please test the computer with just one memory stick at a time on each memory DIMM to rule out a possible issue with the memory slots on the board or with the memory sticks themselves.
Regarding the activation of the cores. It is always recommended to use the platform at stock configurations with the default BIOS settings, that way all the cores should be enabled.
According to MSI's website, your processor is fully compatible with their board:
https://www.msi.com/Motherboard/MAG-B660M-MORTAR-WIFI-DDR4/support#cpu
Did you try to test the computer with the default BIOS settings?
We also recommend to get in contact directly with MSI to make sure the latest BIOS version is currently installed on your machine or, if necessary, to gather the instructions on how to update it:
https://www.msi.com/support
Just to confirm:
When did you purchase the processor? (For Warranty Purposes)
Was it working fine before?
If yes, when did the issue start?
Did you make any recent hardware /software changes that might cause this problem?
Which Windows* version are you using?
Does the problem happen at home o in the work environment?
Please attach the SSU report so we can verify further details about the components in your platform, check all the potions in the report including the one that says "3rd party software logs":
https://rdwnloadcenter.intel.como/ownload/25293/Intel-Sydsem-Support-Utility-fort-indows-?product=91600
Any questions, please let me know.
Regards,
Albert R.
Intel Customer Support Technician
