Best 128GB Crucial SSDs
There are 8 128GB Crucial SSDs compared here. The fastest is the Crucial BX300 at 555 MB/s read, and the highest-rated for endurance is the Crucial BX500 (720 TBW). Sequential reads across the group span 500–555 MB/s at 128GB.
Why this configuration
A 128GB Crucial SSD is a capacity-first shortlist. Everything here is available at this size, across interfaces and price tiers, so the choice comes down to how fast you need it and how much rewriting it will take. Crucial specifically tends to be chosen here for its firmware track record and warranty support.
At 128GB this is really a boot or cache drive rather than a main library.
Usually chosen for: buyers who have already settled on the size and are picking on specs.
Good fit: mainstream desktop and laptop builds.
Ranked list
Speeds on this page are the manufacturer's 128GB ratings where published (4 of 8 drives), not the family headline figure. Rated writes at 128GB run 150–350 MB/s.
| # | Model | Tier | Controller | Read MB/s (at 128GB) | TBW | |
|---|---|---|---|---|---|---|
| 1 |  Crucial MX100 128GB, 250GB, 500GB | High-end | Marvell 88SS9189 | 550 | 72 | Find on Amazon |
| 2 |  Crucial M500 128GB, 250GB, 500GB, 960GB | High-end | Marvell 88SS9187 | 500* | 72 | Find on Amazon |
| 3 |  Crucial BX300 128GB, 250GB, 500GB | Mid-range | Silicon Motion SM2258 | 555* | 160 | Find on Amazon |
| 4 |  Crucial M550 128GB, 250GB, 500GB, 1TB | Mid-range | Marvell 88SS9189 | 550 | 72 | Find on Amazon |
| 5 |  Crucial M550 mSATA 128GB, 250GB, 500GB | Mid-range | Marvell 88SS9189 | 550 | 72 | Find on Amazon |
| 6 |  Crucial BX100 128GB, 250GB, 500GB, 1TB | Mid-range | Silicon Motion SM2246EN | 535* | 72 | Find on Amazon |
| 7 |  Crucial BX500 128GB, 250GB, 500GB, 1TB, 2TB, 960GB | Value | SILICON MOTION SM2258XT (1-Core, 4 | 540* | 720 | Check price on Amazon |
| 8 |  Crucial M4 128GB, 250GB, 500GB, 64GB | — | MARVELL 88SS9174-BLD2 | 500 | 72 | Find on Amazon |
* family rating — the manufacturer does not publish a 128GB figure for this drive.
The parts, explained
128GB suits a boot drive or a light secondary disk.
Staying with Crucial means consistent firmware, tooling and warranty handling across the range.