Sandisk
WD_BLACK SN8100 2TB
2,000 GB · PCIe 5.0 x4 · M.2 2280
8.2
$280MSRP3 videos
Sandisk Optimus GX 7100 2TB
The renamed WD_BLACK SN7100: a very efficient DRAM-less PCIe 4.0 TLC drive with unremarkable all-round speed.
- 2,000 GB
- PCIe 4.0 x4
- M.2 2280
- TLC
- 7,250 MB/s
PCPR score
7.4
Good
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R1
The short version
The Optimus GX 7100 is the current name of the WD_BLACK SN7100, a DRAM-less PCIe 4.0 x4 drive using Sandisk's BiCS8 TLC. The 2TB model is rated for 7,250 MB/s reads and 6,900 MB/s writes with 1,200 TBW. Tom's Hardware found chart-topping power efficiency but only middling overall performance. It suits laptops and low-power desktops. Its price is close to DRAM-equipped drives such as the Optimus GX PRO 850X.
Pros
- Very high power efficiency in Tom's Hardware testing
- 7,250 MB/s reads and 6,900 MB/s writes rated
- 1,200 TBW and a five-year warranty
- Strong random read results in testing
Cons
- Middling all-round performance in testing
- No DRAM cache
- Priced close to DRAM-equipped alternatives
Best for
- Laptops where battery life matters
- Quiet, low-power builds
J3
Full specifications
Core
- Capacity
- 2,000 GB
- Interface
- PCIe 4.0 x4
- Form factor
- M.2 2280
Performance
- NAND
- TLC
- DRAM cache
- No
- Sequential read
- 7,250 MB/s
- Sequential write
- 6,900 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.
P1
Where to buy
- Buy from the maker
Sandisk official page
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AV1
Video reviews
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AV2
What reviewers and owners say
Tom's Hardware
MixedReviewing it as the SN7100, sees chart-leading efficiency and strong random reads, but considers overall performance unexciting and thought pricing at the time was hard to justify next to the SN850X.
3/5 · 2025-03-12
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 SN7100?
Sandisk's SN7100 page says that drive is now the Optimus GX 7100, so reviews of the SN7100 describe this product under its former name.
Does the drive have DRAM?
No. Tom's Hardware lists it as using host memory buffer, which keeps power draw low but gives up some consistency under heavy workloads.
J9Alternatives
