Samsung PM991 512GB PCIe 4.0 x4 NVMe M.2 2242
Samsung
49 Overall Score
vs
Western Digital WD_BLACK SN8100 4TB PCIe 5.0 x4 NVMe M.2 2280
Western Digital
92 Overall Score
Scores
Workstation
Gaming
Console
Laptop
Budget
Portable
Specifications
| Samsung PM991 | Western Digital WD_BLACK SN8100 | |
|---|---|---|
| Drive | ||
| Capacity | ||
| Form Factor | M.2 2242 | M.2 2280 |
| Interface | PCIe 4.0 x4 | PCIe 5.0 x4 |
| Protocol | NVMe | NVMe |
| PCIe Generation | 4 | 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 | TLC |
| DRAM Cache | — | ✓★ |
| Reliability | ||
| Endurance (TBW) | No data | |
| MTBF (hours) | No data | |
| Warranty (years) | — | 3★ |
| Features | ||
| Heatsink | — | ✓★ |
| Hardware Encryption | — | ✓★ |
Pros & Cons
Samsung PM991 512GB PCIe 4.0 x4 NVMe M.2 2242
- Strong speed (68th percentile)
- Below average endurance (15th percentile)15th %ile
- Below average capacity (35th percentile)
Western Digital WD_BLACK SN8100 4TB PCIe 5.0 x4 NVMe M.2 2280
- Strong feature (100th percentile)100th %ile
- Strong speed (100th percentile)100th %ile
- Strong random (100th percentile)100th %ile
- Strong capacity (93rd percentile)93rd %ile
- Below average affordability (8th percentile)8th %ile
Pricing
Samsung PM991 512GB PCIe 4.0 x4 NVMe M.2 2242
No current pricing available
Western Digital WD_BLACK SN8100 4TB PCIe 5.0 x4 NVMe M.2 2280
Verdict
Winner: Western Digital WD_BLACK SN8100
Scores 92 overall, wins 5 of 6 usage categories and 12 of 17 specs.
