since 0x129 microcode BIOS update: not stable with XMPII RAM profiles (PRIME95)

[Gurgeh]

This is more for general community awareness rather than engaging in fault finding but:

Since applying 0x129 microcode BIOS update 2503 08/08/2024) for ROG Z790E Gaming WiFi (1st edition) with intel 13900K Then with all loaded optimised defaults + XMPII profile (Corsair CMH32GX5M2B6400C36 , 2x16GB sticks) , PRIME 95 blend tests fails very easily/quickly. NB: It has been about a year since I last ran these, but I was thorough back then.

All defaults (no XMP) seems stable running for about 20mins far.

Comments welcome. Speculation welcome. Fix suggestions welcome also (I've not got a clue how to approach RAM config timing issues, however, I may not be doing any testing any time soon)

I'm happy to provide more info and answers questions as and when I can though.

[Daniel_DGPL]

Does some on have problem during booting? With new bios in cold start my matherboar posting "b4" error on q-code display and system not booting. 

[Hopper64]

Wonder if that's a USB issue. You might unplug all USB devices except keyboard and mouse and see if that helps. Worth a try.