WD_BLACK SN770 vs WD_BLACK SN850X for PS5
PS5, PS5 Slim and PS5 Pro storage, ranked by value on Amazon.co.uk
As an Amazon Associate we earn from qualifying purchases. Prices and availability come from Amazon.co.uk as of the last update and may change.
Buy the WD_BLACK SN850X. The WD_BLACK SN770 is rated at 5,150 MB/s, below Sony's 5,500 MB/s recommendation, so it is not a like-for-like alternative in a PS5. Today only the WD_BLACK SN850X has a compatible new listing in stock, at £399.63 (£199.82/TB), as of 21 October 2026.
PS5 requirements as published in Sony's M.2 SSD support page. Prices from Amazon.co.uk.
WD_BLACK SN770 vs WD_BLACK SN850X: PS5 spec comparison
| WD_BLACK SN770 | WD_BLACK SN850X | |
|---|---|---|
| PS5 compatible | Works, below spec | Yes |
| Interface | PCIe Gen4 | PCIe Gen4 |
| Read speed (up to) | 5,150 MB/s | 7,300 MB/s |
| Speed inside a PS5 | Below spec | Gen4 link |
| DRAM cache | No | Yes |
| NAND | TLC | TLC |
| Endurance per TB | 600 TBW | 600 TBW |
| Heatsink for PS5 | None, sold bare | Version fits |
| Officially licensed | No | No |
| Largest size | 2TB | 8TB |
| Cheapest 2TB-class listing today | None in stock | £399.63 (£199.82/TB) |
Which should you buy for a PS5?
Buy the WD_BLACK SN850X. The WD_BLACK SN770 is rated at 5,150 MB/s, below Sony's 5,500 MB/s recommendation, so it is not a like-for-like alternative in a PS5.
Today only the WD_BLACK SN850X has a compatible new listing in stock, at £399.63 (£199.82/TB), as of 21 October 2026.
Choose by what matters to you
WD_BLACK SN770
- WD rates the SN770 at 5,150 MB/s for 1TB and 2TB, 5,000 MB/s at 500GB and 4,000 MB/s at 250GB.
- Works, but below spec.
- Rated endurance: 600 TBW per terabyte.
WD_BLACK SN850X
- WD's mainstream Gen4 performer.
- Compatible.
- Rated endurance: 600 TBW per terabyte.
Go deeper
Start with the two model pages, WD_BLACK SN770 and WD_BLACK SN850X, for fit verdicts and live prices. Then widen the search: all 2TB PS5 SSDs, the cheapest PS5 SSDs, or only drives with a heatsink. PS5 SSD requirements explains the gate, and the model index lists further comparisons.
Compatible drives, live prices
Related comparisons and guides
You may also want All models, 2TB, With heatsink, Cheapest PS5 SSD, PS5 SSD requirements, Best value PS5 SSD.
Frequently asked questions
Is the WD_BLACK SN770 or the WD_BLACK SN850X better for the PS5?
Buy the WD_BLACK SN850X. The WD_BLACK SN770 is rated at 5,150 MB/s, below Sony's 5,500 MB/s recommendation, so it is not a like-for-like alternative in a PS5.
Which is cheaper today, the WD_BLACK SN770 or the WD_BLACK SN850X?
Today only the WD_BLACK SN850X has a compatible new listing in stock, at £399.63 (£199.82/TB), as of 21 October 2026.
Is there a speed difference between the WD_BLACK SN770 and WD_BLACK SN850X in a PS5?
Yes. One of the two is under Sony's 5,500 MB/s recommendation, which can mean slower loads in games that stream data heavily.
What are the heatsink options for the WD_BLACK SN770 and WD_BLACK SN850X?
WD_BLACK SN770: none, sold bare. WD_BLACK SN850X: version fits. A bare drive of either model needs a slim heatsink, within 11.25mm overall.
Independent comparison site. Not affiliated with or endorsed by Sony Interactive Entertainment. PlayStation and PS5 are trademarks of Sony.
Last updated: 2026-10-21 06:04:07 UTC. As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date indicated on Amazon.co.uk and are subject to change. Any price displayed at the time of purchase will apply. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED AS IS AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.