Western Digital WD_BLACK SN850X 4TB
4TB · M.2 2280 · PCIe 4.0 x4
Specifications
Yes
DRAM cache
7300 MB/s
Sequential read
6600 MB/s
Sequential write
2400 TBW
Endurance
Family guide
WD_BLACK NVMe SSDs| SN770 | SN850X This model | SN850P | SN7100 | SN8100 | |
|---|---|---|---|---|---|
| Released | 2022 | 2022 | 2023 | 2024 | 2025 |
| Interface | Not available | PCIe 4.0 x4 | PCIe 4.0 x4 | PCIe 4.0 x4 | PCIe 5.0 x4 |
| Read | Not available | 7300 MB/s | 7300 MB/s | 7000 MB/s | 14900 MB/s |
| Write | Not available | 6600 MB/s | 6600 MB/s | 6700 MB/s | 14000 MB/s |
| Endurance | Not available | 2400 TBW | 2400 TBW | 2400 TBW | 2400 TBW |
| Summary | DRAM-less: it borrows system memory (HMB) instead, which the PS5 doesn't support, so console speeds may fall short. | WD_BLACK's flagship PCIe 4.0 drive, with a DRAM cache that the SN770 and SN7100 lack. | Same drive as the SN850X, sold only with a heatsink and licensed for the PS5. | DRAM-less successor to the SN770, with newer TLC flash and better power efficiency. | Has a DRAM cache and draws little power for its speed, but can still run hot without a heatsink. |
Capacity grid
| 250GB | 500GB | 1TB | 2TB | 4TB | 8TB | |
|---|---|---|---|---|---|---|
| SN770 | No listings | $239.28 | $179.14 | $379.99 | Not available | Not available |
| SN850X | Not available | Not available | $229.99 | $373.99 | $729.97 This model | $1,699 |
| SN850P | Not available | Not available | $240 | $419.98 | Out of stock | $1,649.97 |
| SN7100 | Not available | $159.99 | $169.99 | $319 | $629.99 | Not available |
| SN8100 | Not available | Not available | $269.99 | $399 | $759 | $1,699 |
How it compares
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Price history
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Listings
Listings sorted by Price, ascending.
Western Digital WD_Black SN850X 4TB M.2 2280 PCIe Gen 4 x4 Internal SSD Ebay USA $729.97 Western Digital WDS400T2X0E-EC Western Digital SN850X 4TB M.2-2280 PCIe Gen4 x 4 NVMe (Read Up to 7,300MB/sec) Internal SSD Amazon USA $729.99 WD_Black SN850X 4TB NVMe SSD with Heatsink - M.2 2280, Up to 7,300 MB/s Read speeds, Up to 6,300 MB/s Write speeds, Gaming Expansion, High Performance Internal Solid State Drive - WDS400T2XHE Amazon USA $749.00 WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive with Heatsink - W Ebay USA $769.99 WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive with Heatsink - Works with Playstation 5, Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - WDS400T2XHE Newegg USA $769.99 WD_BLACK SN850X 4TB NVMe M.2 PCIe Gen4 SSD Heatsink 7300MB/s WDS400T2XHE Ebay USA $774.25 WD_BLACK SN850X 4TB NVMe SSD - M.2 2280, Up to 7,300 MB/s Read speeds, Up to 6,300 MB/s write speeds, Gaming Expansion, High Performance Internal Solid State Drive - WDS400T2X0E Amazon USA $782.99 WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - WDS400T2X0E Newegg USA $789.99 WD_Black SN850X 4TB NVMe PCIe 4.0 x4 M.2 Internal Gaming SSD Without Heatsink Amazon USA $789.99 WD_BLACK 4TB SSD SN850X NVMe M.2 2280 PCIe 4.0 x4 Internal Solid State Drive Ebay USA $789.99 Western Digital WDS400T2X0E 4TB M.2 PCIe 4.0 NVMe Gaming SSD Ebay USA $844.16 Western Digital WD BLACK 4TB SN850X (without HEATSINK PS5 Ready) M.2 NVMe NEW Ebay USA $849.98 Western Digital WDS400T2XHE WD Black SN850X 4TB NVMe M.2 PCIe Gen4 SSD 7300 MB/s TECHRUS5P26 Ebay USA $866.34 WD _Black SN850X 4TB NVMe PCIe 4.0 x4 M.2 Internal Gaming SSD with Heatsink Amazon USA $874.99 Western Digital WDS400T2XHE 4TB SSD M.2 2280 PCIe 4.0 NVMe Ebay USA $879.36 WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 KING20PCTDEAL Ebay USA $1,030.51 WD_Black SN850X NVMe SSD 4TB Game Drive (Gen 4) Ebay USA $1,104.29 WD_BLACK SN850X 4TB NVMe SSD - M.2 2280, Up to 7,300 MB/s Read speeds, Up to ... Ebay USA $1,140.94 WD Black SN850X 4TB M.2 2280 PCIe Internal Solid State Drive WDS400T2X0E Ebay USA $2,068.60 WD Black SN850X 4TB M.2 2280 PCIe Internal Solid State Drive WDS400T2X0E Ebay USA $2,068.60 Western Digital 4TB SN850X M.2 2280 Gaming SSD Built-in NVMe PCIe Gen4x4 Read Up to 7300MB/s Write Up to 6600MB/s WDBB9G0040BNC [Parallel Import] Out of stock Amazon USA — WD WD_BLACK SN850X 4TB Internal NVMe SSD Gen4x4 WDBB9G0040BNC, Factory Sealed Out of stock Ebay USA — WD BLACK SN850X 4TB PCIE 4.0 NVMe M.2 2280 SSD WDS400T2X0E New Sealed Out of stock Ebay USA — WD BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive Out of stock Ebay USA — WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive - WDS400T2X0E Out of stock Ebay USA — New WD Black SN850X SSD 4TB NVMe (WDS400T2X0E-00BCA0) Out of stock Ebay USA — Western Digital SanDisk WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Out of stock Ebay USA — WD _BLACK SN850X 4TB NVMe PCIe 4.0 x4 M.2 Internal Gaming SSD without Heatsink Out of stock Ebay USA — WD_Black 4TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe M.2 2280 up to 7,300MB/s - WDS400T2X0E (Black 4TB) Out of stock Amazon USA —