Samsung PM991 256GB PCIe 3.0 x4 NVMe M.2 2242
Samsung
38 Overall Score
vs
Western Digital WD_BLACK SN8100 1TB PCIe 5.0 x4 NVMe M.2 2280
Western Digital
95 Overall Score
What Buyers Say
Samsung PM991 256GB PCIe 3.0 x4 NVMe M.2 2242
No customer feedback yet
Western Digital WD_BLACK SN8100 1TB PCIe 5.0 x4 NVMe M.2 2280
95 out of 100 low confidence 9 reviews
All seven verified reviews are overwhelmingly positive, praising the WD_BLACK SN8100 as the fastest Gen5 NVMe SSD with no issues. Users highlight its sustained speeds, strong performance on PCIe 5.0 motherboards, and good value at the time of purchase. One reviewer notes it outlasts other drives in cache performance, and Q&A confirms M.2 2280 form factor with up to 14,900 MBps read speed.
Pros
- Fastest Gen5 NVMe SSD
- No issues of any kind
- Super fast on PCIe 5.0
- Strong sustained speeds
- Good price at time of purchase
Cons
- Expensive (implied by 'if you can afford it')
Performance speed 7
Reliability 2
Value for money 2
Cache performance 1
Compatibility pcie5 1
Price affordability 1
Scores
Budget
Workstation
Gaming
Console
Laptop
Portable
Specifications
| Samsung PM991 | Western Digital WD_BLACK SN8100 | |
|---|---|---|
| Drive | ||
| Capacity | ||
| Form Factor | M.2 2242 | M.2 2280 |
| Interface | PCIe 3.0 x4 | PCIe 5.0 x4 |
| Protocol | NVMe | NVMe |
| PCIe Generation | 3 | 5★ |
| External | ✗ | ✗ |
| Performance | ||
| Sequential Read (MB/s) | No data | |
| Sequential Write (MB/s) | No data | |
| Random Read (IOPS) | No data | |
| Random Write (IOPS) | No data | |
| Hardware | ||
| NAND | — | TLC★ |
| DRAM Cache | — | ✓★ |
| Reliability | ||
| Endurance (TBW) | No data | |
| MTBF (hours) | No data | |
| Warranty (years) | — | 3★ |
| Features | ||
| Heatsink | — | ✓★ |
| Hardware Encryption | — | ✓★ |
Pros & Cons
Samsung PM991 256GB PCIe 3.0 x4 NVMe M.2 2242
- Strong affordability (82nd percentile)82nd %ile
- Strong social proof (77th percentile)
- Below average endurance (15th percentile)15th %ile
- Below average feature (15th percentile)15th %ile
- Below average capacity (18th percentile)18th %ile
Western Digital WD_BLACK SN8100 1TB PCIe 5.0 x4 NVMe M.2 2280
- Strong feature (100th percentile)100th %ile
- Strong user sentiment (100th percentile)100th %ile
- Strong random (99th percentile)99th %ile
- Strong speed (98th percentile)98th %ile
Verdict
Winner: Western Digital WD_BLACK SN8100
Scores 95 overall, wins 6 of 6 usage categories and 13 of 17 specs.