[toast0]

> 64GB wasn't enough for 64 concurrent clang runs. You need a little bit more (but of course 128GB is the next installable increment).

That's not really true, you can mix and match memory, and you might not get ideal bandwidth, but for a lot of uses it's just fine.

[namibj]

Notably, triple-rank configurations work just fine. It's just not trivial to find both a dual-rank module and a single-rank module with the same components used on both (so all the sub-timings match and performance will be nice and proper).