Western Digital Black SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280
fanxiang S501 128GB PCIe 3.0 x4 NVMe M.2 2280
What Buyers Say
Western Digital Black SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280
The WD Black SN850X is highly praised for its blazing speed, reliability, and value, often compared favorably to pricier alternatives like Samsung and Solidigm. Users report excellent performance in gaming (especially PS5) and general use, with a few concerns about potential issues mitigated by firmware updates. Overall, it's seen as a top-tier NVMe drive, especially when on sale.
Pros
- Blazing fast speeds
- Excellent value for money
- Reliable high-capacity storage
- Great for PS5
- Easy installation
Cons
- Potential firmware issues
- No heatsink included
- Pricey when not on sale
fanxiang S501 128GB PCIe 3.0 x4 NVMe M.2 2280
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
Scores
Specifications
| Western Digital 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 | ✓★ | ✗ |
| Controller | WD 20-82-20035-B1 | — |
| Reliability | ||
| Endurance (TBW) | No data | |
| MTBF (hours) | No data | |
| Warranty (years) | 5★ | — |
| Features | ||
| Heatsink | ✗ | — |
| Hardware Encryption | ✗ | ✓★ |
Pros & Cons
Western Digital 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 user sentiment (95th percentile)95th %ile
- Strong capacity (93rd percentile)93rd %ile
- Below average affordability (11th percentile)11th %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
Scores 99 overall, wins 6 of 6 usage categories and 10 of 18 specs.