Lexar NM790 4TB SSD Review

We used CrystalDiskMark 8‘s custom settings to test the 4K random read 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.

We haven't seen any official 4K random performance figures for the NM790 but the Maxiotech controller is rated as up to 1,000K IOPS for random reads. Using our 4-threaded tests we couldn't get close to that figure. The best we saw was 620,827 IOPS.

4K Random Read v QD Performance

With 4TB of fast NAND running at a full 2400 MT/s interface speed the drive produced the fastest speeds at QDs 1, 2 and 32 we've seen to date for any consumer drive. At QD4 it is still the fastest Gen 4 drive but is outstripped by all the Gen 5 drives we've tested.

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