SanDisk Optimus GX PRO 850X 1TB PCIe 4.0 NVMe M.2 2280 SSD

SANDISK Optimus™ GX PRO 850X PCIe® 4.0 NVMe™ SSD, 1TB, Read 7,300MB/s Write 6,600MB/s, 5 Yr Warranty

The SanDisk Optimus GX PRO 850X 1TB NVMe M.2 SSD delivers sequential read speeds of up to 7,300 MB/s directly to your system, utilising the PCIe 4.0 x4 interface to eliminate storage bottlenecks. Engineered with a dedicated DRAM cache and premium TLC 3D NAND, this drive maintains high-speed performance during massive file transfers and demanding multitasking sessions.

Sustained PCIe 4.0 throughput for demanding creative workloads

Built for sustained productivity, this M.2 SSD achieves sequential write speeds of up to 6,300 MB/s. Unlike DRAM-less drives that slow down during extended file copies, the Optimus GX PRO 850X features a dedicated DRAM cache. This cache acts as a high-speed buffer, keeping transfer rates consistent when copying large 4K video projects, rendering complex 3D scenes, or moving massive game libraries. The integration of SanDisk BiCS TLC 3D NAND ensures that physical data storage remains highly efficient and stable under heavy write cycles, preventing the performance degradation common in lesser drive architectures.

High random IOPS for responsive multitasking and gaming

System responsiveness depends heavily on random input/output operations. Powered by the WD Black G2 controller, this drive reaches up to 1,100,000 random write IOPS and 800,000 random read IOPS. In practice, this high random performance translates to near-instantaneous boot times, rapid game level loading, and fluid system operation when running multiple background applications. Operating on the NVMe 1.4 protocol, the drive optimises queue depths to handle simultaneous data requests without system stuttering, ensuring that asset-heavy games and database applications run without interruption.

Enterprise-grade security and long-term hardware endurance

Reliability is central to the design of the Optimus GX PRO 850X. It features a 600 TBW (Terabytes Written) endurance rating alongside a 1.75 million hours MTBF, meaning you can write hundreds of gigabytes daily for years without degrading the NAND cells. For sensitive professional environments, integrated TCG Opal v2.01 hardware-based encryption protects your data at the controller level without compromising transfer speeds.

The drive's physical dimensions conform to the standard M.2 2280 form factor, weighing just 7.5 grams. This ultra-slim profile ensures broad compatibility with modern desktop motherboards and thin-and-light laptops. A 5-year warranty provides long-term assurance for your system build.

Specification