Sandisk
WD_BLACK SN8100 2TB
2,000 GB · PCIe 5.0 x4 · M.2 2280
8.2
$280MSRP3 videos
Sandisk Optimus 5100 2TB
A QLC PCIe 4.0 drive with quick burst speeds and good efficiency, but weak sustained write performance.
- 2,000 GB
- PCIe 4.0 x4
- M.2 2280
- QLC
- 7,100 MB/s
PCPR score
7.1
Fair
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R1
The short version
The Optimus 5100 is Sandisk's budget PCIe 4.0 x4 drive, using BiCS8 QLC flash and no DRAM. The 2TB model is rated for 7,100 MB/s reads and 6,700 MB/s writes with a five-year warranty. Sandisk's page says the WD Blue SN5100 is now this drive, and Tom's Hardware called the SN5100 the best QLC drive it had tested. It suits general storage and game libraries. Sustained writes are its weak point, and QLC endurance is lower than TLC.
Pros
- 7,100 MB/s reads rated for a budget drive
- Excellent power efficiency in testing of the SN5100
- Five-year limited warranty
Cons
- Poor sustained write performance in testing
- QLC flash endures less than TLC
- No DRAM cache
Best for
- General PC storage
- Game libraries that are mostly read
J3
Full specifications
Core
- Capacity
- 2,000 GB
- Interface
- PCIe 4.0 x4
- Form factor
- M.2 2280
Performance
- NAND
- QLC
- DRAM cache
- No
- Sequential read
- 7,100 MB/s
- Sequential write
- 6,700 MB/s
Features
- 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
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AV1
Video reviews
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AV2
What reviewers and owners say
Tom's Hardware
PositiveConsiders the WD Blue SN5100 the strongest QLC drive it has tested, with impressive efficiency, while flagging weak sustained writes and pricing that was high at review time.
4/5 · 2025-09-23
Read the source
Summaries are written in our words. Follow the links for each source’s own review.
R9
Common questions
Is it the same drive as the WD Blue SN5100?
Yes. Sandisk's WD Blue SN5100 page says that drive is now the Optimus 5100, so reviews of the SN5100 describe this product under its former name.
Is QLC fine for gaming?
Game loading is mostly reading, which QLC handles well. Long sustained writes, such as moving very large files, are where this drive slows down.
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