Lexar NM790 4TB SSD Review

We used CrystalDiskMark 8‘s custom settings to test the 4K random write performance of the drive through a range of queue depths. The setup for the tests is listed below.

Transfer Request Size: 4KB, Outstanding I/O: 1-32.

Just as with the random read performance, the controller of the drive is rated as up to 1,000K IOPs for random writes. As with the random read results with our 4-threaded tests, we couldn't get close to this figure with the best test result of 518,199 IOPS at QD32.

4K Random Write v QD Performance

Despite not being able to match the official maximum figure, the test results for the NM790 make it the fastest consumer Gen4 drive we've seen to date for random write performance.

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