The WD_BLACK SN850X 2TB with Heatsink is the same flagship drive as the standard SN850X 2TB, but bundled with an integrated heatsink designed to fit the PS5’s M.2 expansion slot and to manage temperatures in busy desktop builds. At around $179 it adds genuine cooling and a striking visual to one of the best Gen 4 SSDs you can buy. This is one of the most popular PS5 expansion picks on the market — a no-fuss path to fitting a flagship Gen 4 drive into Sony’s console without sourcing a separate heatsink. This WD_BLACK SN850X 2TB Heatsink review covers the speeds, the cooling, PS5 fitment, real-world use and value.
WD_BLACK SN850X 2TB 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 - WDS200T2XHE
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WD_BLACK SN850X 2TB with Heatsink at a Glance
| Component | Specification |
|---|---|
| Form factor | M.2 2280 with integrated heatsink |
| Interface | PCIe 4.0 x4 NVMe |
| Capacity | 2TB (also 1TB and 4TB heatsink variants) |
| Sequential read | Up to 7,300 MB/s |
| Sequential write | Up to 6,600 MB/s |
| Random read IOPS | Up to 1,200K (4K QD32) |
| DRAM cache | Yes — LPDDR4 DRAM |
| NAND type | BiCS 5 3D TLC |
| Warranty | 5-year limited / 1,200 TBW for 2TB |
| Approx price | around $179 |
Speeds & Performance
Under the heatsink, the drive is identical to the standard SN850X 2TB — same WD controller, same LPDDR4 DRAM cache, same BiCS 5 TLC flash and the same Game Mode 2.0 firmware. Sequential reads are quoted up to 7,300 MB/s with writes up to 6,600 MB/s, sitting at the practical ceiling of the PCIe 4.0 x4 interface. Random reads of around 1,200K IOPS keep Windows, applications and games feeling instant.
The practical advantage of the heatsink variant is sustained performance. Bare M.2 SSDs can thermally throttle under prolonged heavy writes — large file transfers, sustained video edits, lengthy DirectStorage texture streaming — and a proper heatsink keeps the controller within its peak performance window for longer. In desktops with motherboard M.2 heatsinks the benefit is modest; in laptops, consoles or boards without M.2 cooling, it is genuinely useful. See our best NVMe SSDs for gaming guide for comparisons.
WD’s heatsink design is also a passive aluminium block with fin geometry tuned for the PS5’s airflow patterns specifically. It is not a vapour-chamber or fan-cooled solution — just a well-shaped passive heat spreader — but for the PS5’s modest sustained write profile it is genuinely effective. The dark, angular look matches WD_BLACK styling and looks at home in a build with RGB lighting and dark aesthetics.
DRAM Cache & Endurance
Identical to the standard SN850X 2TB — full LPDDR4 DRAM cache backs the WD controller for high sustained random write performance and low 4K latency. BiCS 5 TLC flash from the Kioxia / Western Digital joint venture is mature and well characterised. The 2TB capacity is rated at 1,200 TBW over a 5-year limited warranty, which is vastly more than any realistic gaming or creative workload will reach.
The heatsink itself adds height — about 8 mm total — which is the main fitment caveat. Some compact desktops, slim laptops and mini-ITX cases will not have clearance, and some motherboards already have integrated M.2 heatsinks that conflict with the SN850X’s. For these builds, the standard SN850X 2TB plus a custom heatsink is the better pick. WD’s combination of in-house controller, BiCS 5 NAND from the Kioxia-WD joint venture and the long-running Game Mode firmware development gives the SN850X one of the most cohesive end-to-end stacks in consumer storage.
Gaming & Workstation Use Cases
For gaming, the heatsink variant is the right pick when you want maximum sustained performance and your build does not already have an M.2 heatsink — common in laptops and in PS5. WD’s Game Mode 2.0 firmware adds gaming-tuned optimisations on top of the strong baseline. The 2TB capacity comfortably holds a substantial actively-rotating game library plus Windows and applications.
For workstation use, the heatsink helps with sustained writes — large RAW imports, 4K video edits, AI model files, and bulk transfers all stay in the peak performance window for longer than the bare drive. Heavy creative users who already have good motherboard M.2 cooling will not see much benefit; users in thermally-constrained setups will.
There is one more consideration for buyers planning to slot this drive into an existing case — the integrated heatsink raises overall drive height, and some motherboards mount their primary M.2 slot under the GPU’s shadow with limited vertical clearance. Check both the motherboard layout and the GPU’s physical depth before ordering. For boards with a dedicated upper M.2 slot or a clear secondary slot, fitment is rarely an issue.
PS5 Compatibility & Heatsink
The SN850X 2TB with Heatsink is explicitly designed to fit the PS5’s M.2 expansion slot, meeting both Sony’s 5,500 MB/s read requirement and the mandatory heatsink rule out of the box. This is the simplest 2TB PS5 expansion option from WD — no separate heatsink to source and fit, no fitment guesswork.
For a strictly PS5-licensed alternative, see the WD_BLACK SN850P in our best PS5 expansion SSD guide; the SN850P is Sony-validated. The SN850X with Heatsink is a slightly cheaper unofficial-but-fitted choice.
Value & Price Per TB
At around $179 for 2TB with heatsink, the variant carries about a $20 premium over the bare SN850X 2TB. That is fair value: a quality M.2 heatsink alone can cost $20-30 separately, and the integrated WD design is shaped to fit PS5 and matches the SN850X visually. The 2TB heatsink variant is one of the better PS5 expansion picks at this capacity. WD also runs frequent promotions on the heatsink variant, so price-conscious PS5 owners willing to wait for a sale can sometimes find it for very close to the bare-drive price.
Verdict
The WD_BLACK SN850X 2TB with Heatsink is the simplest way to get one of the best Gen 4 SSDs into a PS5 or any build without motherboard M.2 cooling. The underlying drive is identical to the standard SN850X 2TB — flagship speeds, DRAM cache, Game Mode 2.0 firmware, 5-year warranty — and the integrated heatsink solves the cooling and PS5 fitment problem out of the box. For PS5 owners or laptop / mini-ITX builders without M.2 cooling, it earns a clear recommendation. Compare with bare drives in our best NVMe SSDs for gaming guide.
Frequently Asked Questions
Is the SN850X heatsink variant required for PS5?
Sony requires a fitted heatsink for any M.2 SSD in the PS5. The heatsink variant solves this out of the box. The bare SN850X also works in PS5 if you fit a separate heatsink.
Does the SN850X heatsink fit all motherboards?
Not all. The heatsink adds about 8 mm of height. Some motherboards already have integrated M.2 heatsinks that conflict, and some compact cases will not have clearance — check before buying.
Is the heatsink-variant drive faster than the bare SN850X?
Peak performance is identical. The heatsink improves sustained performance by reducing thermal throttling, which matters most in laptops, consoles and boards without M.2 cooling.
How does this compare to the SN850P?
Same underlying hardware as the SN850X with Heatsink. The SN850P adds explicit Sony licensing and validation for PS5 — useful for buyers who specifically want Sony’s official PS5 storage.
More NVMe SSD Reviews
- WD_BLACK SN850X 4TB Review: High-Capacity Gen 4 NVMe SSD
- WD_BLACK SN850P 2TB Review: PS5 Licensed Storage Expansion
- WD_BLACK SN7100 2TB Review: Compact Gen 4 NVMe SSD
- Crucial P310 1TB Review: Compact Gen 4 NVMe SSD (7,100 MB/s)
- Samsung 9100 PRO 1TB Review: PCIe Gen 5 NVMe SSD (2026)
- Samsung 990 PRO 4TB Review: Flagship Gen 4 NVMe SSD
- Samsung 990 PRO 2TB Review: Premium Gen 4 NVMe SSD
- Samsung 990 PRO 1TB Review: Premium Gen 4 NVMe SSD
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