I have them, they are somewhat tricky so far. They don't really match up timing-wise with CJR.
Only paid 2400 SEK for them, about $250. 32 GB B-die kits are hard to find or 50-100% more expensive.
This is the gear I have:
- G.Skill Trident Z Neo DDR4 3600MHz 2x16GB (F4-3600C16D-32GTZNC) - dual-rank
- MSI X470 Gaming Pro Carbon
- Ryzen 3900x
They want tWR of at least 22 and tFAW of at least 42 or training will fail. DRAM Calculator suggests tWR 12 and tFAW 35 for CJR V1 which does not work and requires a clear of CMOS on mine.
procODT 40 Ohm seems better than 48 - 60.
Gear Down Mode enabled seems to work best, a bit higher latency but easier to stabilize.
They are stable with the settings in the Ryzen Master screenshot in memtest, ran up to 2000%.
To me b-die seems too expensive for the performance difference at this time. Hope they can be tweaked further.
EDIT: Better timings found later in the thread. See https://www.overclock.net/forum/1805...l#post28235778