Storage
WD_BLACK SN850X 1TB NVMe SSD
● In Stock
Price on enquiry · Message us for today’s quote
The number printed on the box is the sequential figure, and it is the one that matters least day to day. What makes a machine feel immediate is small random reads — the thousands of tiny requests fired off when Windows starts, when an application opens, when a game streams its textures in. That is where the SN850X is strong, and it is why a build on this drive feels quick in a way a specification sheet does not capture. A boot drive first.
Key Specs
Capacity — 1TB
Interface — PCIe 4.0 NVMe
Form factor — M.2 2280
Options — Heatsink and non-heatsink versions available
Best for — Boot drive and everyday responsiveness
Warranty — Full manufacturer warranty
What It Pairs With
The primary M.2 slot on any current board, carrying Windows and your everyday software. If the board has its own M.2 heatsink, take the bare version and use it; if it does not, the version with the heatsink already fitted saves sourcing one. Pair it with a second, larger drive for the library if you keep more than a handful of titles installed — that split keeps the boot volume uncluttered, which is worth more in practice than it sounds.
Who This Isn’t For
A single-drive machine holding a large library. One terabyte is comfortable for Windows, software and four or five current titles, and tight past that. It is also not the drive for sustained sequential work — long video exports, repeated multi-hundred-gigabyte transfers — where the headline throughput figure genuinely is the thing that decides how long the job takes. Say what the machine is for and we will tell you which property you should be buying.
Common Questions
Why does random performance matter more than the big number?
Because almost nothing you do all day is one continuous file. Booting, opening software and loading a level are each thousands of small reads, and a drive that handles those well feels faster than one with a higher sequential figure that does not.
Heatsink version or the bare drive?
If your motherboard ships with M.2 heatsinks, buy the bare drive — you cannot use both. If it does not, the pre-fitted version is the tidier answer. Send us the board model and we will say which one to order.
Will it work in a PCIe 5.0 slot?
Yes, at its own PCIe 4.0 speed. Nothing is lost and nothing needs setting; the slot simply runs at the drive’s generation. If the board has one Gen5 slot and several Gen4 ones, leave the Gen5 slot free for later and fit this in a Gen4 position.
Send us your motherboard model with the enquiry and we will confirm which M.2 slot to use, whether it shares bandwidth with a SATA port, and whether you want the heatsink version. Availability confirmed at time of quote.