Best Crucial MLC SSDs
There are 11 Crucial MLC SSDs compared here. The fastest is the Crucial BX300 at 555 MB/s read, and the highest-rated for endurance is the Crucial MX300 (400 TBW). Sequential reads across the group span 500–555 MB/s.
Why this configuration
A Crucial MLC SSD is a legacy endurance choice. MLC stores two bits per cell instead of three, so these older drives take far more rewriting than a modern budget drive, at a much higher cost per gigabyte. Crucial specifically tends to be chosen here for its firmware track record and warranty support.
Usually chosen for: write-heavy secondary roles and keeping older machines useful.
Good fit: mainstream desktop and laptop builds.
Ranked list
| # | Model | Tier | Controller | Read MB/s | TBW | |
|---|---|---|---|---|---|---|
| 1 |  Crucial MX300 1TB, 2TB, 275GB, 525GB, 750GB | High-end | MARVEL 88SS1074 (2-Core, 4-Canais, | 530 | 400 | Check price on Amazon |
| 2 |  Crucial MX100 128GB, 250GB, 500GB | High-end | Marvell 88SS9189 | 550 | 72 | Find on Amazon |
| 3 |  Crucial MX200 250GB, 500GB, 1TB | High-end | Marvell 88SS9189 | 550 | 320 | Find on Amazon |
| 4 |  Crucial MX200 M.2 250GB, 500GB | High-end | Marvell 88SS9189 | 550 | 160 | Find on Amazon |
| 5 |  Crucial MX300 M.2 1TB, 275GB, 525GB | High-end | MARVEL 88SS1074 (2-Core, 4-Canais, | 530 | 360 | Find on Amazon |
| 6 |  Crucial M500 128GB, 250GB, 500GB, 960GB | High-end | Marvell 88SS9187 | 500 | 72 | Find on Amazon |
| 7 |  Crucial BX300 128GB, 250GB, 500GB | Mid-range | Silicon Motion SM2258 | 555 | 160 | Find on Amazon |
| 8 |  Crucial M550 128GB, 250GB, 500GB, 1TB | Mid-range | Marvell 88SS9189 | 550 | 72 | Find on Amazon |
| 9 |  Crucial M550 mSATA 128GB, 250GB, 500GB | Mid-range | Marvell 88SS9189 | 550 | 72 | Find on Amazon |
| 10 |  Crucial BX100 128GB, 250GB, 500GB, 1TB | Mid-range | Silicon Motion SM2246EN | 535 | 72 | Find on Amazon |
| 11 |  Crucial M4 128GB, 250GB, 500GB, 64GB | — | MARVELL 88SS9174-BLD2 | 500 | 72 | Find on Amazon |
The parts, explained
MLC NAND is older and costs more per gigabyte, but is very durable.
Staying with Crucial means consistent firmware, tooling and warranty handling across the range.