WD_BLACK SN850P vs SanDisk Optimus GX PRO 850P for PS5
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These are the same drive family under two names. SanDisk, now separate from Western Digital, renamed the WD_BLACK NVMe line SANDISK Optimus in January 2026, and the Optimus GX PRO 850P is the officially licensed PS5 drive in that range, as the SN850P was before it. Both read at up to 7,300 MB/s (7,200 MB/s at 8TB), both carry a five-year warranty and both ship with a licensed heatsink that fits the bay; the 850P's heatsink is a new design. In a PS5 nothing separates them, so buy whichever is cheaper today at the size you want. Today only the SanDisk Optimus GX PRO 850P has a compatible new listing in stock, at £545.99 (£273.00/TB), as of 21 October 2026.
PS5 requirements as published in Sony's M.2 SSD support page. Prices from Amazon.co.uk.
Side by side: WD_BLACK SN850P and SanDisk Optimus GX PRO 850P
| WD_BLACK SN850P | SanDisk Optimus GX PRO 850P | |
|---|---|---|
| PS5 compatible | Yes | Yes |
| Interface | PCIe Gen4 | PCIe Gen4 |
| Read speed (up to) | 7,300 MB/s | 7,300 MB/s |
| Speed inside a PS5 | Gen4 link | Gen4 link |
| DRAM cache | Yes | Not stated by maker |
| NAND | TLC | - |
| Endurance per TB | 600 TBW | 600 TBW |
| Heatsink for PS5 | Fitted as standard | Fitted as standard |
| Officially licensed | Yes | Yes |
| Largest size | 8TB | 8TB |
| Cheapest 2TB-class listing today | None in stock | £545.99 (£273.00/TB) |
The verdict for PS5 owners
These are the same drive family under two names. SanDisk, now separate from Western Digital, renamed the WD_BLACK NVMe line SANDISK Optimus in January 2026, and the Optimus GX PRO 850P is the officially licensed PS5 drive in that range, as the SN850P was before it. Both read at up to 7,300 MB/s (7,200 MB/s at 8TB), both carry a five-year warranty and both ship with a licensed heatsink that fits the bay; the 850P's heatsink is a new design. In a PS5 nothing separates them, so buy whichever is cheaper today at the size you want.
Today only the SanDisk Optimus GX PRO 850P has a compatible new listing in stock, at £545.99 (£273.00/TB), as of 21 October 2026.
Reasons to pick each
WD_BLACK SN850P
- The officially licensed WD drive, sold only with its heatsink attached.
- Compatible and officially PlayStation-licensed.
- Rated endurance: 600 TBW per terabyte.
SanDisk Optimus GX PRO 850P
- SanDisk's licensed PS5 drive, launched after the company renamed the WD_BLACK NVMe line SANDISK Optimus in January 2026.
- Compatible and officially PlayStation-licensed.
- Rated endurance: 600 TBW per terabyte.
More on both drives
Each drive has its own page with a full spec sheet and every live listing: WD_BLACK SN850P and SanDisk Optimus GX PRO 850P. For the wider field see all 2TB PS5 SSDs, PS5 SSDs with a heatsink and the cheapest PS5 SSDs. The rules both drives are judged against are in PS5 SSD requirements, and more pairings are on the model index.
Compatible drives, live prices
Related comparisons and guides
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Frequently asked questions
WD_BLACK SN850P or SanDisk Optimus GX PRO 850P: which should I put in my PS5?
These are the same drive family under two names. SanDisk, now separate from Western Digital, renamed the WD_BLACK NVMe line SANDISK Optimus in January 2026, and the Optimus GX PRO 850P is the officially licensed PS5 drive in that range, as the SN850P was before it. Both read at up to 7,300 MB/s (7,200 MB/s at 8TB), both carry a five-year warranty and both ship with a licensed heatsink that fits the bay; the 850P's heatsink is a new design. In a PS5 nothing separates them, so buy whichever is cheaper today at the size you want.
Which is cheaper today, the WD_BLACK SN850P or the SanDisk Optimus GX PRO 850P?
Today only the SanDisk Optimus GX PRO 850P has a compatible new listing in stock, at £545.99 (£273.00/TB), as of 21 October 2026.
Do games load faster on the WD_BLACK SN850P or the SanDisk Optimus GX PRO 850P?
In practice they are level. The WD_BLACK SN850P quotes 7,300 MB/s and the SanDisk Optimus GX PRO 850P 7,300 MB/s, and both are past the point where extra speed shortens PS5 loading.
Which has a heatsink that fits the PS5, the WD_BLACK SN850P or the SanDisk Optimus GX PRO 850P?
WD_BLACK SN850P: fitted as standard. SanDisk Optimus GX PRO 850P: fitted as standard. Whichever you choose must end up no thicker than 11.25mm with its heatsink on.
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Last updated: 2026-10-21 00:03:24 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.