New
ATTECH AT422 256GB SATA III 2.5"
Capacity 256GB
Form Factor 2.5"
Interface SATA III
Read Speed 550 MB/s
21 Overall Score
No current retailer price
Snapshot
Pros & Cons
Pros
- Strong affordability (94th percentile) 94th
Cons
- Below average social proof (7th percentile)
- Below average feature (15th percentile)
- Below average capacity (18th percentile)
- Below average random (23rd percentile)
The proof
Performance
Specifications
Full Specifications
Drive
| Capacity | 256 |
| Form Factor | 2.5" |
| Interface | SATA III |
| Protocol | SATA |
| External | No |
Performance
| Sequential Read (MB/s) | 550 |
| Sequential Write (MB/s) | 500 |
Reliability
| Warranty (years) | 3 |
Features
| Heatsink | No |
vs Competition
| Spec | ATTECH AT422 | Samsung 9100 PRO | Western Digital WD_BLACK WDS800T2XHE | Kingston FURY Renegade SFYRDK/4000G | Crucial T710 | SanDisk Black SN850X WDBB9G0040BNC-WRSN |
|---|---|---|---|---|---|---|
| Capacity | 256GB | 4TB | 8TB | 4TB | 4TB | 4TB |
| Form Factor | 2.5" | M.2 2280 | M.2 2280 | M.2 2280 | M.2 2280 | M.2 |
| Interface | SATA III | PCIe 5.0 x4 | PCIe 4.0 | PCIe 4.0 x4 | PCIe 5.0 x4 | PCIe 4.0 x4 |
| Seq Read | 550 MB/s | 14,800 MB/s | 7,300 MB/s | 7,300 MB/s | 14,500 MB/s | 7,300 MB/s |
| Nand Type | - | TLC | TLC | TLC | TLC | TLC |
| Dram Cache | - | true | true | true | false | true |
| Endurance | - | 2400 TBW | 4800 TBW | 4000 TBW | 2400 TBW | 2400 TBW |
| Compare | Compare | Compare | Compare | Compare |
| Product | Speed | Random | Feature | Capacity | Endurance | Social Proof | Affordability |
|---|---|---|---|---|---|---|---|
| ATTECH AT422 | 28.2 | 22.8 | 14.7 | 17.8 | 42.3 | 7.4 | 94 |
| Samsung 9100 PRO Compare | 99.2 | 99.8 | 99.7 | 92.6 | 86 | 99.6 | 5.3 |
| Western Digital WD_BLACK WDS800T2XHE Compare | 89 | 96.4 | 93.9 | 98.1 | 88.1 | 95.3 | 4 |
| Kingston FURY Renegade SFYRDK/4000G Compare | 93.3 | 94.4 | 93.9 | 92.6 | 94.1 | 95.3 | 9.3 |
| Crucial T710 Compare | 99.1 | 99.2 | 85.7 | 92.6 | 86 | 77.4 | 10.9 |
| SanDisk Black SN850X WDBB9G0040BNC-WRSN Compare | 89 | 95.8 | 89.4 | 92.6 | 88.1 | 95.3 | 9.6 |
Price
Value & Pricing
We started tracking prices for this product on Nov 14, 2026. The chart appears once we have more data.
Usage Scores
- Overall21.4
- Budget62.4
- Gaming12.4
- Laptop17.7
- Console5.4
- Portable4.3
- Workstation21.3
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
