New
Samsung PM991
Capacity 256GB
Form Factor M.2 2242
Interface PCIe 3.0 x4
38 Overall Score
No current retailer price
Snapshot
Pros & Cons
Pros
- Strong social proof (80th percentile) 80th
Cons
- Below average endurance (14th percentile)
- Below average feature (14th percentile)
- Below average capacity (17th percentile)
The proof
Performance
Specifications
Full Specifications
Drive
| Capacity | 256 |
| Form Factor | M.2 2242 |
| Interface | PCIe 3.0 x4 |
| Protocol | NVMe |
| PCIe Generation | 3 |
| External | No |
vs Competition
| Spec | Samsung PM991 | SanDisk WD_Black SN8100 WDS100T1X0M | Crucial T710 CT1000T710SSD5 | Corsair MP700 Elite | Western Digital Black SN850X | ADATA GAMMIX S70 Blade AGAMMIXS70B-2T-CS |
|---|---|---|---|---|---|---|
| Capacity | 256GB | 1TB | 1TB | 1TB | 1TB | 2TB |
| Form Factor | M.2 2242 | M.2 2280 | M.2 2280 | M.2 2280 | M.2 | M.2 2280 |
| Interface | PCIe 3.0 x4 | PCIe 5.0 x4 | PCIe 5.0 x4 | PCIe 5.0 x4 | PCIe 4.0 x4 | PCIe 4.0 |
| Seq Read | - | 14,900 MB/s | 14,900 MB/s | 10,000 MB/s | 7,300 MB/s | 7,400 MB/s |
| Nand Type | - | TLC | TLC | TLC | TLC | TLC |
| Dram Cache | - | true | true | false | true | true |
| Endurance | - | 4800 TBW | 600 TBW | 600 TBW | 600 TBW | 1480 TBW |
| Compare | Compare | Compare | Compare | Compare |
| Product | Speed | Random | Feature | Capacity | Endurance | Social Proof |
|---|---|---|---|---|---|---|
| Samsung PM991 | 50.5 | 60.6 | 14.3 | 17.1 | 14.3 | 79.7 |
| SanDisk WD_Black SN8100 WDS100T1X0M Compare | 97.4 | 99 | 90.6 | 54.6 | 99 | 95.6 |
| Crucial T710 CT1000T710SSD5 Compare | 99.2 | 98.7 | 99.8 | 54.6 | 86 | 79.7 |
| Corsair MP700 Elite Compare | 94.6 | 96.4 | 85.6 | 54.6 | 87.3 | 95.6 |
| Western Digital Black SN850X Compare | 84.7 | 92.2 | 93.8 | 54.6 | 87.9 | 95.6 |
| ADATA GAMMIX S70 Blade AGAMMIXS70B-2T-CS Compare | 92.2 | 89.5 | 93.8 | 78.4 | 77.2 | 79.7 |
Price
Value & Pricing
We started tracking prices for this product on Nov 8, 2026. The chart appears once we have more data.
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
