WD Black SN770 1TB SSD Review

1. Introduction2. WD Black SN770 1TB3. 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. Performance Stability16. Drive Temperatures17. Real Life File Testing18. Closing Thoughts19. View All Pages

We used CrystalDiskMark 8’s custom settings to test the 4K 70/30 mixed read/write performance of the drive through a range of queue depths using a single thread and four threads.

The WD Black SN770 has no problem dealing with our 70/30 read/write tests either using a single thread or with four threads. With a single thread, the drive produces 21,918.5 IOPS (89.778MB/s) at QD1 climbing to finish the test run at QD32 with 141,079 IOPS (577.859MB/s). Using four threads the drive climbs from 84,425.2 IOPS (345.806MB/s) at QD1 to 389,599 IOPS (1599.2MB/s) at QD32.

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