The best 4K random write figure we saw during our 4–threaded testing was 117,506 IOPS (QD8), a long way short of the official maximum 400,000 IOPS. As with the random reads, we did a quick test at a QD of 32 using eight threads which resulted in a figure of 448,325 IOPS, bettering the official maximum.
4K Random Write v QD Performance
Kioxia's Exceria NVMe struggles in relation to most of the other drives in our result charts.