Lexar NM790 with Heatsink 4TB SSD Review

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

128KB Sequential Read / Write.

Transfer Request Size: 128KB, Thread(s): 1, Outstanding I/O: 1-32.

In this test, we couldn't quite hit the official maximum Sequential read and write speeds of 7,400MB/s and 6,500MB/s respectively but with a best-read result of 7,388MB/s and a best-write figure of 6,481MB/s, we got very close.

128KB Sequential Read v QD Performance

The best-read performance for the NM790 with Heatsink in relation to the drives around it comes at QDs 2 and 4 where it sits in fourth place in the results chart. At QD1 and QD32, it sits just inside the top 10.

128KB Sequential Write QD Performance

At QD1 the NM790 with Heatsink is some 531MB/s slower than the standard drive for some reason we couldn't fathom. At all the other tested queue depths, the heatsink-equipped drive is faster than the standard model.

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