Dear forumers,
Years later, not much of Optane DCPMM has been seen on the desktop. Yet I feel a GAS-like itch to experiment with DCPMM and try to understand the situation across the (mother)boards.
Supermicro is the reference implementation with the full "
glorious complexity" of Memory Mode, Application Direct and Mixed Mode across the whole X11SP_, X11DP_, X12SP_ and X12DP_ linup. But these boards, even the workstation ones, do not sleep (S3), which isn't nice on the desktop.
AsRockRack supports only Memory Mode on C621 boards. And there's not much clarity as to what is supported on C621A.
Gigabyte "black PCB" boards (C621-SU8/SD12/WD12) do not support Optane DCPMM; this feature is only for the more enterprise-focussed "blue PCB", such as
MD71-HB0. Memory Mode and App Direct are mentioned but not Mixed Mode, and there's nothing clear in the BIOS manual.
Asus is like Gigabyte: No support on workstation boards, only on server boards (Z11PA-U12)—with even less advertisement than from Gigabyte.
Is the above correct? What's your experience and what would you advise?
Should I perhaps resist the itch and just forget because on one hand there's no use case for Optane DCPMM compared to just stuffing one's computer with cheaper RAM and/or fast NVMe drives, and because on the other hand there are reasons why not much has been added since the 2019 STH piece and why Optane DCPMM are now trickling down second-hand channels at not-so-eye-watering prices?