Western Digital WD_BLACK SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280
Western Digital
94 Overall Score
vs
Silicon Power Ace A55 2TB SATA III 2.5"
Silicon Power
45 Overall Score
What Buyers Say
Western Digital WD_BLACK SN850X 4TB PCIe 4.0 x4 NVMe M.2 2280
No customer feedback yet
Silicon Power Ace A55 2TB SATA III 2.5"
72 out of 100 low confidence 8 reviews
Most users are very satisfied with this SSD, praising its speed, ease of installation, and excellent value for money, especially when upgrading from a hard drive. However, a couple of reviews report early failures and data loss, which tempers overall enthusiasm. The product is generally recommended for budget builds and laptop upgrades, but reliability concerns remain for some.
Pros
- Fast performance
- Easy installation
- Great value for money
- Good for laptop upgrades
- Includes migration software
Cons
- Early failure risk
- Data loss reported
- Not for heavy write workloads
Performance 6
Value for money 5
Reliability 3
Ease of installation 2
Laptop upgrade 2
Migration software 1
Scores
Console
Gaming
Workstation
Budget
Laptop
Portable
Specifications
| Western Digital WD_BLACK SN850X | Silicon Power Ace A55 | |
|---|---|---|
| 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) | No data | |
| Random Write (IOPS) | No data | |
| Hardware | ||
| NAND | TLC | TLC |
| DRAM Cache | ✓★ | ✗ |
| Reliability | ||
| Endurance (TBW) | No data | |
| MTBF (hours) | ||
| Warranty (years) | 3 | 3 |
| Features | ||
| Heatsink | ✓★ | ✗ |
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
Silicon Power Ace A55 2TB SATA III 2.5"
- Strong capacity (79th percentile)
- Below average speed (15th percentile)15th %ile
- Below average random (23rd percentile)
- Below average user sentiment (29th percentile)
Verdict
Winner: Western Digital WD_BLACK SN850X
Scores 94 overall, wins 6 of 6 usage categories and 10 of 16 specs.