I have the same low random writes issue. Was getting arround 1 000 000 IOPS after the initial windows setup, now after a few updates and softwares installed I’m at 650 000 iops without XMP (Magician bench, CDM with NVME parameter, AS SSD same results). Sequential speeds seems normal (read 7100 / 6820mo/s write)
- MSI Z790i, DDR5 32gb 6400, 13700K (no PL/UV)
- Samsung 990 pro 4To, initial firmware was 0B2QJXG7, updated to 4B2QJXD7. It's running on the cpu M.2 chipset of the board at pcie 4.0x4
- Windows 11 pro 23H2, last to date drivers and bios.
- Enabled « full performance mode » in Magician → Didn’t change anything.
- Closed most of the background process and network for the benchs
- Enabling XMP gives even worse random writes 450 000 IOPS (both confirmed in Magician and CDM)
- Processor at 100 % during sequential writing, arround 50 % during random writing. Disk temps are normal at 35 – 45°C.
I don’t know what’s wrong and what the lower score with XMP enabled even means. I haven’t run tests for the memory stability with xmp yet, is it bad sign somehow?
I guess since there are differents users reporting the same issue for the drive, it might not be hardware related but a firmware issue ? My random read speeds are equal to the advertised ones.
Also, not sure if that’s normal but I was at 400go written on the ssd after windows install and a few programs. I’m now at 4,5To after maybe 10-12 benchmarks runs, do they write that much data?