Intel® Processors, Tools, and Utilities
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brand new i9-13900k - CPU mismatch / self test / microcode Q code errors???


hello!  i very recently set up an i9-13900k on an Asus Z790 Hero board.


i have noticed that during high use periods where the CPU is really getting hit, i notice Q Codes 57,58, and 59 on the board.   These are described as "CPU mismatch" , "CPU self test failed or possible CPU cache error", "CPU micro-code is not found or micro-code update is failed".


everything SEEMS to work just fine though. i have tried a burn in test, benchmarking, and the intel processor diagnostic tool. everything passes and seems to work to spec.

i'm wondering if this is maybe a bios related thing with a very new CPU??  


has anyone else seen/heard this before?  i've never had an out of box failure on an intel chip before and and wondering if i just keep it or return it for an exchange?


what do you think?



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Super User

If you are wondering about the BIOS, why ask here?   Ask ASUS, it is their bios.   Also,  make sure you get asus to help you update their bios.


Trying to get a replacement before you know where or what the problem is is premature.


Doc (not an Intel employee or contractor)
[Maybe Windows 12 will be better]

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