I wouldn't say that as myself and others have had significant trouble or been unable to even post using LRDIMMs.
I do have a promising update though. I was finally able to POST my LRDIMMs but it's still a work in progress. I had to first boot with an 8GB RDIMM. From there I have to manually set several memory timings in the AMD CBS page of the BIOS. I then save, shutdown, swap in my LRDIMM sticks and then reboot. This will get me into the OS at speeds up to 2666mhz but not 2933mhz. The single RDIMM stick though will boot up to 2933mhz without issue.
The issue seems to be that for some reason the BIOS isn't pulling timings from my LRDIMM and is unable to train the DDR on boot, so it never gets to POST. My memory is Samsung and on the QVL for LRDIMMs so it's not likely a memory issue (and the memory works fine at lower speeds).
If it was just an issue of being unable to hit 2933 it'd be disappointing but not awful, the problem though is that it can't POST at all. So clearing the CMOS means I won't be able to boot my server without swapping out the LRDIMMs. So it's frustrating to test timings as there is no way to boot the machine if timings are off without doing a physical memory swap.
I'm narrowing in on the specific settings by going through the LRDIMM datasheets and trying to match specs with slightly different named BIOS settings. It's beyond tedious. I suspect the issue is the BIOS applies 2R timings and not 4R timings for some tertiary settings, causing the no-POST. I just have to find which ones have to be manually set and which ones can be left on AUTO for normal boot memory training. Now that I know the memory is good and works I'll eventually find the magic combo.
gb00s, if you have any screenshots of 2933mhz timings for your LRDIMM setups on the MZ32, it'd be greatly appreciated!
