Description
SANDISK Optimus™ GX PRO 850X PCIe® 4.0 NVMe™ SSD with Heatsink, 1TB, Read 7,300MB/s Write 6,600MB/s, 5 Yr Warranty
The SanDisk Optimus GX PRO 850X 1TB PCIe 4.0 NVMe M.2 SSD delivers sequential read speeds of up to 7,300 MB/s and write speeds of up to 6,300 MB/s to handle intensive data transfers. Equipped with a factory-fitted physical heatsink, this drive maintains peak performance during sustained gaming sessions and heavy creative workloads.
Engineered for high-performance gaming and intensive creative workflows
Built for users who demand rapid load times and responsive system behaviour, this M.2 2280 S3-M drive is optimised for modern gaming setups and workstation environments. With random read speeds of up to 800,000 IOPS and random write speeds of up to 1,100,000 IOPS, the drive processes small, scattered files rapidly. This translates directly to faster level loads in modern games, quicker boot times, and smoother timeline scrubbing when editing high-resolution video assets.
Sustained PCIe 4.0 speeds powered by nCache 4.0 and TLC NAND
At the core of the drive is the WD Black G2 controller, paired with SanDisk BiCS TLC 3D NAND to deliver reliable high-speed throughput. A dedicated physical DRAM cache ensures rapid translation table lookups, maintaining high performance even as the drive fills up. To manage bursts of heavy write activity, the drive utilises SanDisk nCache 4.0 technology, an SLC caching algorithm that dynamically allocates high-speed single-level cell cache to accelerate file transfers and prevent write-speed degradation during large file copies.
| Interface | PCIe 4.0 x4, NVMe 1.4 |
| Sequential Read | 7,300 MB/s |
| Sequential Write | 6,300 MB/s |
| Random Read (IOPS) | 800,000 IOPS |
| Random Write (IOPS) | 1,100,000 IOPS |
Integrated heatsink for consistent thermal control under heavy loads
High-performance PCIe 4.0 drives generate significant heat under sustained workloads, which can lead to thermal throttling. This model features a pre-installed physical heatsink engineered to dissipate heat efficiently, keeping the drive within its optimal operating temperature range of 0°C to 85°C. The low-profile shape of the heatsink ensures physical compatibility with desktop motherboards and compatible gaming consoles, providing stable performance without requiring additional aftermarket cooling solutions.
Built for long-term reliability and data security
With an endurance rating of 600 TBW (Terabytes Written) and a Mean Time To Failure (MTTF) of 1.75 million hours, the drive is engineered to handle years of daily read and write cycles. For users handling sensitive data, the drive supports TCG Opal v2.01 hardware-based encryption. This self-encrypting drive capability secures your data at the hardware level without impacting system performance, ensuring peace of mind for professional environments.
Five-year manufacturer warranty
The SanDisk Optimus GX PRO 850X is backed by a 5-year manufacturer warranty, offering long-term support and assurance of build quality.
Specification
| Capacity | 1 TB |
|---|---|
| Form Factor | M.2 2280 S3-M |
| Interface | PCIe 4.0 x4 |
| Protocol | NVMe 1.4 |
| Controller | WD Black G2 (20-82-20035-B2) |
| NAND Type | SanDisk BiCS TLC 3D NAND |
| DRAM Cache | Yes |
| SLC Cache | SanDisk nCache 4.0 |
| Sequential Read | 7,300 MB/s |
| Sequential Write | 6,300 MB/s |
| Random Read IOPS | 800,000 IOPS |
| Random Write IOPS | 1,100,000 IOPS |
| TBW Endurance | 600 TBW |
| MTTF | 1.75 Million Hours |
| Encryption | TCG Opal v2.01 |
| Operating Temperature Range | 0°C to 85°C |
| Non-Operating Temperature Range | -40°C to 85°C |
| Heatsink | Yes |
| Warranty | 5 Years |