WD_Black SN770M 2TB SSD Review

1. Introduction2. WD Black SN770 - 2TB3. Testing Methodology4. CrystalDiskMark5. ATTO Disk Benchmark6. AS SSD7. 128KB Sequential Performance8. 4K Random Read v QD Performance9. 4K Random Write v QD Performance10. 4K 70/30 Mixed Performance11. 4K Random Performance QD1-QD812. Throughput13. PCMark 10 Full System Drive Benchmark14. 3DMark Storage Benchmark15. Final Fantasy XIV Endwalker Official Benchmark16. Drive Temperatures17. Real Life File Testing18. Closing Thoughts19. View All Pages

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.

The 2TB WD_Black SN770M is officially rated as up to 650,000 IOPS for random reads. Using our 4-threaded random read test we couldn't quite get to the official maximum as the best we saw was 591.267 IOPS (QD32).

4K Sustained Random Read v QD.

At QDs 1, 2 and 4 the drive languishes at the bottom of the results chart but at QD32 it rockets up to near the top of the table.

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