SANDISK Optimus GX PRO 850X 4TB

Written analysis

SANDISK Optimus GX PRO 850X 4TB at a glance

The SANDISK Optimus GX PRO 850X 4TB is a 4000 GB M.2 2280 SSD using PCIe 4.0 x4, NVMe 1.4. The controller is SanDisk 20-82-20035-B1. Flash type is TLC 112-layer. Cache is listed as DDR4-3200.

Rated sequential throughput is 7300 MB/s read and 6600 MB/s write. Random throughput is 1200K read IOPS and 1000K write IOPS. The calculated specification score is 74.9.

Best fit: General storage workloads where compatibility and price matter more than peak transfer rates.

Endurance and thermals

Rated endurance is 2400 TBW, or approximately 600 TBW per TB of capacity. The listed warranty is 5 years.

Current value

At $1000, the drive costs $250.00 per TB. Performance / price is 11.2 and capacity value is 45.0. Compare these values with nearby drives below; interface generation and headline speed alone do not determine value.