New On sale 10%
SanDisk Optimus GX PRO 850X
Capacity 4TB
Form Factor M.2 2280
Interface PCIe 4.0 x4
Read Speed 7,300 MB/s
NAND TLC
Endurance 4800 TBW
82 Overall Score
Price $1,167
Snapshot
Pros & Cons
Pros
- Strong random (96th percentile) 96th
- Strong endurance (94th percentile) 94th
- Strong capacity (93rd percentile) 93rd
- Strong speed (88th percentile) 88th
Cons
- Below average social proof (7th percentile)
The proof
Performance
Specifications
Full Specifications
Drive
| Capacity | 4000 |
| Form Factor | M.2 2280 |
| Interface | PCIe 4.0 x4 |
| Protocol | NVMe |
| PCIe Generation | 4 |
| External | No |
Performance
| Sequential Read (MB/s) | 7300 |
| Sequential Write (MB/s) | 6600 |
| Random Read (IOPS) | 1200000 |
| Random Write (IOPS) | 1200000 |
Hardware
| NAND | TLC |
Reliability
| Endurance (TBW) | 4800 |
| Warranty (years) | 5 |
Features
| Hardware Encryption | Yes |
vs Competition
| Spec | SanDisk Optimus GX PRO 850X | Samsung 9100 PRO | Crucial T500 | Kingston FURY Renegade SFYRDK/2000G | Western Digital Black SN850X | Corsair MP700 Elite |
|---|---|---|---|---|---|---|
| Capacity | 4TB | 8TB | 2TB | 2TB | 4TB | 2TB |
| Form Factor | M.2 2280 | M.2 2280 | M.2 2280 | M.2 2280 | M.2 2280 | M.2 2280 |
| Interface | PCIe 4.0 x4 | PCIe 5.0 x4 | PCIe 4.0 x4 | PCIe 4.0 x4 | PCIe 4.0 x4 | PCIe 5.0 x4 |
| Seq Read | 7,300 MB/s | 14,800 MB/s | 7,400 MB/s | 7,300 MB/s | 7,300 MB/s | 10,000 MB/s |
| Nand Type | TLC | TLC | TLC | TLC | TLC | TLC |
| Dram Cache | - | true | true | true | true | true |
| Endurance | 4800 TBW | 4800 TBW | 1200 TBW | 2000 TBW | 2400 TBW | 1200 TBW |
| Compare | Compare | Compare | Compare | Compare |
| Product | Speed | Random | Feature | Capacity | Endurance | Social Proof |
|---|---|---|---|---|---|---|
| SanDisk Optimus GX PRO 850X | 87.8 | 95.5 | 78.5 | 92.9 | 94.4 | 6.9 |
| Samsung 9100 PRO Compare | 98.8 | 99.7 | 99.7 | 98.2 | 86 | 96.6 |
| Crucial T500 Compare | 93.5 | 96.2 | 98.9 | 78.5 | 83 | 99.7 |
| Kingston FURY Renegade SFYRDK/2000G Compare | 92.5 | 93.2 | 93.6 | 78.5 | 92.8 | 96.6 |
| Western Digital Black SN850X Compare | 87.8 | 94.6 | 88.6 | 92.9 | 88 | 96.6 |
| Corsair MP700 Elite Compare | 94.6 | 96.3 | 99.7 | 78.5 | 87.4 | 48.9 |
Price
Value & Pricing
From $1,167
Best Buy 1 offer From $1,167
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.
