Sandisk
WD_BLACK SN8100 2TB
2,000 GB · PCIe 5.0 x4 · M.2 2280
8.2
$280MSRP3 videos
Sandisk Optimus GX PRO 850X 2TB
The renamed WD_BLACK SN850X: a DRAM-equipped PCIe 4.0 TLC drive rated at 7,300 MB/s reads in its 2TB form.
- 2,000 GB
- PCIe 4.0 x4
- M.2 2280
- TLC
- 7,300 MB/s
PCPR score
8.0
Great
Best price we’ve seen
$400Nov 9
Checked recently. Confirm at the retailer.
R1
The short version
Sandisk's Optimus GX PRO 850X is the current name of the WD_BLACK SN850X, a PCIe 4.0 x4 drive with DRAM and Sandisk TLC NAND. The 2TB model is rated for 7,300 MB/s reads and 6,600 MB/s writes with 1,200 TBW and a five-year warranty. Tom's Hardware's review of the 8TB SN850X found strong all-round performance. It suits gaming PCs and creator systems, though PCIe 5.0 drives offer higher peak speeds.
Pros
- 7,300 MB/s reads and 6,600 MB/s writes rated
- DRAM cache with Sandisk TLC and 1,200 TBW
- Five-year limited warranty
- Optional heatsink model compatible with PS5
Cons
- PCIe 5.0 drives offer higher peak speeds
- Reviews still refer to it under the older WD_BLACK SN850X name
Best for
- Gaming PCs and PS5 upgrades
- Creators who want DRAM and TLC
J3
Full specifications
Core
- Capacity
- 2,000 GB
- Interface
- PCIe 4.0 x4
- Form factor
- M.2 2280
Performance
- NAND
- TLC
- DRAM cache
- Yes
- Sequential read
- 7,300 MB/s
- Sequential write
- 6,600 MB/s
Features
- Endurance
- 1,200 TBW
- Warranty
- 5 years
Physical
- Heatsink included
- No
Compatibility notes
- PCIe 4.0 x4 M.2 2280; backward compatible with PCIe 3.0 slots at lower speed.
- This bare model is 2.3 mm tall; the separate heatsink model is about 9 mm tall for PS5 installs.
P1
Where to buy
Best Buy
Seen Nov 9, 2026
$399.99
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AV1
Video reviews
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AV2
What reviewers and owners say
Tom's Hardware
PositiveReviews the 8TB SN850X, the drive since renamed Optimus GX PRO 850X, and finds strong all-round speed with few compromises, though that capacity costs far more than two smaller drives.
4/5 · 2024-10-16
Read the source
Summaries are written in our words. Follow the links for each source’s own review.
R9
Common questions
Is this the same drive as the WD_BLACK SN850X?
Sandisk's SN850X page says that drive is now the Optimus GX PRO 850X, so reviews of the SN850X describe this product under its former name.
Will it fit a PS5?
Sandisk says the heatsink version is compatible with PS5 and PS5 Pro. This bare model would need a suitable heatsink added first.
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