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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: 74.11

Overall Rank:  127

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

Average Drive Rating
51878
Samples: 1887

Disk Test Suite Average Results for WD BLACK SN850X 4TB

Sequential Read6,602 MBytes/Sec
Sequential Write5,763 MBytes/Sec
Random Seek Read Write (IOPS 32KQD20)4,459 MBytes/Sec
IOPS 4KQD1102 MBytes/Sec
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Pricing History


Drive Rating Relative to Top 10 SSDs Common Drives
As of 26th of March 2025 - Higher results represent better performance
Drive Average Disk Rating
WD BLACK SN850X 4TB
51,878
WD BLACK SN850X 2000GB
51,512
Samsung SSD 990 PRO 2TB
50,128
Samsung SSD 990 PRO 1TB
48,998
KINGSTON KC3000 2TB
48,839
WD BLACK SN850X 1TB
47,326
Kingston FURY Renegade SFYRS 1000G
45,388
KINGSTON KC3000 1TB
44,919
WD BLACK SN850 1TB
42,894
Samsung SSD 980 PRO 2TB
41,918
Last 5 Baselines for WD BLACK SN850X 4TB
Most recent listed first
Baseline Disk Rating
BL2499359 - Mar 22 2025
56335
BL2499336 - Mar 22 2025
55286
BL2499326 - Mar 22 2025
55659
BL2499198 - Mar 22 2025
46945
BL2499190 - Mar 22 2025
25887