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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: 73.33

Overall Rank:  230

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

Average Drive Rating
51333
Samples: 3021

Disk Test Suite Average Results for WD BLACK SN850X 4TB

Sequential Read6,604 MBytes/Sec
Sequential Write5,741 MBytes/Sec
Random Seek Read Write (IOPS 32KQD20)4,425 MBytes/Sec
IOPS 4KQD199 MBytes/Sec
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Pricing History


Drive Rating Relative to Top 10 SSDs Common Drives
As of 7th of November 2025 - Higher results represent better performance
Drive Average Disk Rating
WD BLACK SN850X 2000GB
51,689
WD BLACK SN850X 4TB
51,333
Samsung 990 Pro PM9F1 4TB SSD
51,226
Samsung 990 Pro PM9F1 2TB SSD
49,889
KINGSTON FURY Renegade 2TB SSD
49,486
KINGSTON KC3000 2TB
49,120
Samsung 990 Pro PM9F1 1TB SSD
48,665
WD BLACK SN850X 1TB
47,014
Kingston FURY Renegade 1TB SSD
44,679
KINGSTON KC3000 1TB
44,261
Last 5 Baselines for WD BLACK SN850X 4TB
Most recent listed first
Baseline Disk Rating
BL3034836 - Nov 07 2025
52060
BL3034428 - Nov 07 2025
30363
BL3034016 - Nov 07 2025
35844
BL3033820 - Nov 07 2025
32801
BL3033711 - Nov 07 2025
55364