@tsialex Can you please point me where to seek for the dimm slot config?
View attachment 835392
Here is a difference between the two roms with the MemoryConfig explicitly defined.
googling for module description I have only found out that SaveMemoryConfig is responsiblefor writing the config to nvram, while MemorySubClass reads the currently installed DRAM config. So the only possible MemoryConfig -aware module in the firmware is the UncoreInitPeim. But inside the module is the hex config which I barely able to understand as you might see.
Since MP5,1 ROM successfully boots up on XS3,1 with the only issue being the 8 out of 12 RAM slots operational, I suppose that is easier fixing that isuue rather then trying adding the microcode etc. I currently have two quadcore logicbords to test with, and a dualcore logicboard on the way, and since I recently purchased a CH341a I am not afraid of bricking at least on of the mobo during such severe tests...
Sorry, but I'm not going to help with Xserve, this is non-negotiable.
I know that it's not fair with other Xserve people, but one bad Xserve user spoiled the bunch.
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