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 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.

With this Sequential performance test, we can confirm the official Sequential ratings of 5,150MB/s and 4,850MB/s for read/writes respectively with peak test results of 5,233.97MB/s for reads and 4,891.6MB/s for writes. There is a large drop-off in the read performance at QD8 but the drive recovers quickly to finish the run at 5,233.97MB/s. Writes peak at QD4 and slowly drop away, finishing the test run (QD32) at 4,846.87MB/s.

128KB Sequential Read v QD compared

The drive sits in the top half of the Sequential read results table at QDs 1, 2 and 4 but by the end of the test run, it has fallen to near the bottom of the chart.

128KB Sequential Write v QD compared.

When it comes to the Sequential writes result tables, the drive doesn't get out of the bottom half of the table for the whole of the test run.

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