SanDisk
SanDisk Optimus GX PRO 850X Spec and Price in Canada
NVME1TBM.2 22807300 MB/s read
SanDisk's Gen4 PRO line runs 7,300/6,600 MB/s on TLC NAND with a DRAM cache, per the documented listings — the PRO 850X tops the Optimus family across 1TB to 4TB for performance-focused builds.
Tied 20th of 106 models in the SSD catalog on Sequential read — 6 models share this figure. Tied 24th of 106 models in the SSD catalog on Sequential write — 4 models share this figure.
Current best price
Prices exclude GST/HST.
Captured periodically and may have changed.- 1TB
- 2TB
- 4TB
May 13, 2026120 capturestoday · $889.88
Each point is one capture, not a list price. How we track prices
Specifications
- Capacity
- 1TB
- Interface
- NVME
- Sequential read
- 7300 MB/s
- Sequential write
- 6600 MB/s
- PCIe generation
- 4
- Form factor
- M.2 2280
- NAND type
- TLC
- DRAM cache
Capacities
Guides for this category
How to choose an SSDFour questions decide almost every SSD purchase — what fits, how big, how fast, and how much it should cost.NVMe or SATAWhich interface your machine takes, how to tell without opening it, and what the speed difference actually buys you.How much SSD capacity you actually needHow to size a drive from what you already use, why leaving headroom matters, and when one bigger drive beats two small ones.M.2 sizes and SSD form factorsWhat 2280, 2242, and 2.5-inch mean, which one your machine takes, and how to check the keying before you buy.What SSD speed numbers actually tell youSequential versus random performance, why the number on the box describes the rarer case, and how to read it without being misled.PCIe generations for SSDsWhat Gen 3, Gen 4, and Gen 5 change, why a newer drive always works in an older slot, and when the extra speed is worth paying for.TLC, QLC, and DRAM-less SSDsWhat the NAND type and the controller's cache change about how a drive behaves, and when either is worth caring about.SSD endurance and warrantiesWhat TBW and DWPD actually promise, how much a normal machine writes, and when endurance is worth paying extra for.How to install an SSDFitting an M.2 or 2.5-inch drive, choosing between cloning and a clean install, and what to check on the first boot.When an SSD price is actually goodWhy price per terabyte beats any discount percentage, and why a good price on one capacity says nothing about the others.
Sources
Every spec above was pulled from one of these — a field a source didn't state was left off rather than estimated.