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WD BLACK SN850X 4TB

Price and performance details for the WD BLACK SN850X 4TB can be found below. This is made using thousands of PerformanceTest benchmark results and is updated daily.

  • The first graph shows the relative performance of the Hard Drive compared to the 10 other common Hard Drives in terms of PassMark Disk Rating.
  • The 2nd graph shows the value for money, in terms of the Disk Rating per dollar.

WD BLACK SN850X 4TB

Description:  WDS400T2X0E

Drive Size:  3.6 TB

Other names:  WD_BLACK SN850X 4000GB, NVMe WD_BLACK SN850X 4000GB

Drive First Benchmarked: 2022-09-18

Drive Rating/$Price: 73.36

Overall Rank:  282

Last Price Change:  $699.99 USD (2022-08-22)

Average Drive Rating
51353
Samples: 3423

Disk Test Suite Average Results for WD BLACK SN850X 4TB

Sequential Read6,645 MBytes/Sec
Sequential Write5,756 MBytes/Sec
Random Seek Read Write (IOPS 32KQD20)4,402 MBytes/Sec
IOPS 4KQD1100 MBytes/Sec
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Pricing History


Drive Rating Relative to Top 10 Common Drives
As of 9th of February 2026 - Higher results represent better performance
Drive Average Disk Rating
Samsung 9100 PRO 2TB SSD
85,853
WD BLACK SN850X 2000GB
51,429
WD BLACK SN850X 4TB
51,353
Samsung 990 Pro PM9F1 4TB SSD
51,045
Samsung 990 Pro PM9F1 2TB SSD
49,608
KINGSTON FURY Renegade 2TB SSD
49,218
KINGSTON KC3000 2TB
49,125
Samsung 990 Pro PM9F1 1TB SSD
48,426
WD BLACK SN850X 1TB
46,756
Kingston FURY Renegade 1TB SSD
44,414
Last 5 Baselines for WD BLACK SN850X 4TB
Most recent listed first
Baseline Disk Rating
BL3268794 - Feb 06 2026
50578
BL3266844 - Feb 06 2026
54809
BL3266312 - Feb 05 2026
51709
BL3264186 - Feb 05 2026
51895
BL3263018 - Feb 04 2026
48075