Samsung SM951 512GB M.2 PCIe SSD Review


IOMeter 4KB Random Performance

Our 4KB random performance test is conducted in the same manner as our sequential tests, but once the drive is conditioned we run our saved random test profile that runs our 4KB test for two minutes without any idle time in between the tests. The queue depth is set to 32 on four workers and the test is begun. To get the benefits from NVMe based drives you must use multiple CPU queues and this is why we are now using four workers for this IOMeter test.


IOPS is the main thing we are looking at in this test scenario and the Samsung SM951 512GB drive is rated at 90,000 IOPS for the 4K Random Read and 70,000 for the 4KB Random Writes. As you can see we have easily surpassed that number with 179,200 IOPS Read and 88,000 IOPS Write.


When it comes to MBps you are looking at 734MB/s on the 4KB Random Reads and 360MB/s on the 4KB Random writes.


The response times on the Samsung SM951 were below 1.5ms for both read and write operations, which is great.