New On sale 22%
Samsung PM991
Capacity 256GB
Form Factor M.2 2242
Interface PCIe 3.0 x4
38 Overall Score
Price $63
Snapshot
Pros & Cons
Pros
- Strong social proof (79th percentile) 79th
Cons
- Below average feature (14th percentile)
- Below average endurance (14th percentile)
- Below average capacity (18th 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 | Crucial T500 CT1000T500SSD5 | Western Digital WD Blue SN5100 | SK Hynix Platinum P41 SHPP41-2000GM-2 | XPG Mars 980 Blade SMAR-980B-1TCS | Kingston NV3 SNV3SM3/2T0 |
|---|---|---|---|---|---|---|
| Capacity | 256GB | 1TB | 1TB | 2TB | 1TB | 2TB |
| Form Factor | M.2 2242 | M.2 2280 | M.2 2280 | M.2 2280 | M.2 2280 | M.2 2230 |
| Interface | PCIe 3.0 x4 | PCIe 4.0 | PCIe 4.0 x4 | PCIe 4.0 | PCIe 5.0 x4 | PCIe 4.0 x4 |
| Seq Read | - | 7,300 MB/s | 7,100 MB/s | 7,000 MB/s | 14,000 MB/s | 6,000 MB/s |
| Nand Type | - | TLC | TLC | TLC | TLC | TLC |
| Dram Cache | - | true | false | true | true | - |
| Endurance | - | 600 TBW | 600 TBW | 1200 TBW | 740 TBW | 640 TBW |
| Compare | Compare | Compare | Compare | Compare |
| Product | Speed | Random | Feature | Capacity | Endurance | Social Proof |
|---|---|---|---|---|---|---|
| Samsung PM991 | 51.4 | 61.3 | 14.1 | 17.5 | 14.3 | 78.9 |
| Crucial T500 CT1000T500SSD5 Compare | 90.8 | 96.2 | 99 | 54.9 | 82.6 | 95.4 |
| Western Digital WD Blue SN5100 Compare | 86.4 | 95.1 | 78.5 | 54.9 | 87.5 | 95.4 |
| SK Hynix Platinum P41 SHPP41-2000GM-2 Compare | 83.1 | 96.6 | 93.9 | 78.3 | 85.6 | 49.9 |
| XPG Mars 980 Blade SMAR-980B-1TCS Compare | 96.8 | 98 | 97.5 | 54.9 | 81.4 | 0 |
| Kingston NV3 SNV3SM3/2T0 Compare | 76.7 | 61.3 | 52.8 | 78.3 | 69.2 | 88 |
Price
Value & Pricing
From $63
Amazon 1 offer From $63
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.
