In our 4-threaded 4K random read test, the drive's performance rose steadily as the queue depth deepened but the rate of increase did seem to slow down from QD16. The best performance we saw from the drive was 258,753 IOPS at a QD of 32.
4K Sustained Random Read v QD Performance Compared.
The drive is no match for the PCIe Gen4 drives when it comes to random read performance, although having said that it is slightly faster than the 1TB version of Sabrent's Rocket 4 Plus at a QD of 32.