Western Digital WD_BLACK SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280
Western Digital
94 Overall Score
vs
fanxiang S501 128GB PCIe 3.0 x4 NVMe M.2 2280
fanxiang
36 Overall Score
What Buyers Say
Western Digital WD_BLACK SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280
No customer feedback yet
fanxiang S501 128GB PCIe 3.0 x4 NVMe M.2 2280
78 out of 100 medium confidence 10 reviews
Most users are very satisfied with this budget NVMe SSD, praising its speed, easy installation, and excellent value for money. A few mention it works well for repairs or upgrades, with one user noting it has been reliable for over a year. However, one verified buyer received a defective unit that was read-only and completely unusable, which is a significant concern.
Pros
- fast speed
- easy installation
- great value for money
- works well for repairs
- reliable over time
Cons
- defective unit out of box
- read-only mode failure
- brand reliability concern
Value for money 5
Speed 4
Ease of installation 4
Reliability 3
Defective unit 1
Suitability for repairs 2
Scores
Console
Gaming
Workstation
Budget
Laptop
Portable
Specifications
| Western Digital WD_BLACK SN850X | fanxiang S501 | |
|---|---|---|
| Drive | ||
| Capacity | ||
| Form Factor | M.2 2280 | M.2 2280 |
| Interface | PCIe 4.0 x4 | PCIe 3.0 x4 |
| Protocol | NVMe | NVMe |
| PCIe Generation | 4★ | 3 |
| External | ✗ | ✗ |
| Performance | ||
| Sequential Read (MB/s) | ||
| Sequential Write (MB/s) | ||
| Random Read (IOPS) | No data | |
| Random Write (IOPS) | No data | |
| Hardware | ||
| NAND | TLC | TLC |
| DRAM Cache | ✓★ | ✗ |
| Reliability | ||
| Endurance (TBW) | No data | |
| MTBF (hours) | No data | |
| Warranty (years) | 3★ | — |
| Features | ||
| Heatsink | ✓★ | — |
| Hardware Encryption | — | ✓★ |
Pros & Cons
Western Digital WD_BLACK SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280
- Strong random (96th percentile)96th %ile
- Strong social proof (95th percentile)95th %ile
- Strong feature (94th percentile)94th %ile
- Strong capacity (93rd percentile)93rd %ile
- Below average affordability (9th percentile)9th %ile
fanxiang S501 128GB PCIe 3.0 x4 NVMe M.2 2280
- Strong affordability (95th percentile)95th %ile
- Strong feature (79th percentile)
- Below average capacity (7th percentile)7th %ile
- Below average endurance (15th percentile)15th %ile
Verdict
Winner: Western Digital WD_BLACK SN850X
Scores 94 overall, wins 6 of 6 usage categories and 11 of 17 specs.