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by noir_lord 86 days ago
You need to enable MCR (which trains the memory once and caches the result for (iirc) 30 days) otherwise yeah, booting is horribly slow, even the 64GB I have can take several minutes but with MCR it boots basically instantly.

Some motherboards have it off by default.
2 comments
kenhwang 86 days ago
Memory training seems to be getting faster with each bios update. In 2024 when I upgraded to AM5, 64GB memory training took like 15 minutes. Now the same setup takes about a minute when it needs to retrain, then near instant with MCR (Windows 11 takes significantly longer to load than the POST process).
link
mort96 86 days ago
From my comment:

> The 30 minute boot time could be worked around by enabling the (off-by-default) memory context restore option in BIOS

link