Western Digital WD_BLACK SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280
Western Digital
94 Overall Score
vs
Samsung 850 EVO 4TB SATA III 2.5"
Samsung
58 Overall Score
What Buyers Say
Western Digital WD_BLACK SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280
No customer feedback yet
Samsung 850 EVO 4TB SATA III 2.5"
85 out of 100 low confidence 6 reviews
Users are generally satisfied with this SSD, praising its small size, large capacity, and speed improvements. One reviewer notes the need for a firmware update, while another highlights the cost-effectiveness compared to HDDs for specific use cases. The Q&A confirms it's lightweight and compatible with certain Mac models, though it lacks a 3.5" bay adapter.
Pros
- small size
- large capacity
- speed improvements
- lightweight
- good for backups
Cons
- firmware update needed
- no 3.5" bay adapter
- expensive vs HDD
Size 2
Capacity 1
Speed 2
Firmware update 1
Value for money 2
Compatibility 1
Scores
Console
Gaming
Workstation
Budget
Laptop
Portable
Specifications
| Western Digital WD_BLACK SN850X | Samsung 850 EVO | |
|---|---|---|
| Drive | ||
| Capacity | ||
| Form Factor | M.2 2280 | 2.5" |
| Interface | PCIe 4.0 x4 | SATA III |
| Protocol | NVMe | SATA |
| PCIe Generation | 4★ | — |
| External | ✗ | ✗ |
| Performance | ||
| Sequential Read (MB/s) | ||
| Sequential Write (MB/s) | ||
| Random Read (IOPS) | ||
| Random Write (IOPS) | ||
| Hardware | ||
| NAND | TLC | TLC |
| DRAM Cache | ✓ | ✓ |
| Controller | — | MHX |
| Reliability | ||
| Endurance (TBW) | ||
| MTBF (hours) | ||
| Warranty (years) | 3 | 5★ |
| 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
Samsung 850 EVO 4TB SATA III 2.5"
- Strong feature (94th percentile)94th %ile
- Strong capacity (93rd percentile)93rd %ile
- Strong endurance (67th percentile)
- Strong user sentiment (65th percentile)
- Below average affordability (7th percentile)7th %ile
- Below average social proof (9th percentile)9th %ile
- Below average speed (31st percentile)
Pricing
Western Digital WD_BLACK SN850X 4TB PCIe 4.0 x4 NVMe M.2 22800.144score per dollar
vs
Samsung 850 EVO 4TB SATA III 2.5"0.065score per dollar
Western Digital WD_BLACK SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280 offers 2.2x better value for money
Verdict
Winner: Western Digital WD_BLACK SN850X
Scores 94 overall, wins 6 of 6 usage categories and 8 of 18 specs.
