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 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.

Officially the WD_Black SN770M is rated at up to 800,000 IOPS for 4K random writes. Using our 4-threaded tests we fell a long way short of this mark, the best we saw was 564,908 IOPS (QD32).

4K Sustained Random Write v QD.

Even though our test result is a long way off the official figure it is still good enough to put the drive in the top 10 of Gen 4 drives we've tested to date and at QD32, it's the fastest drive we've seen to date.

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