Best 128GB ADATA MLC SSDs
There are 5 128GB ADATA MLC SSDs compared here. The fastest is the ADATA XPG SX8000 at 1000 MB/s read at 128GB, and the highest-rated for endurance is the ADATA SU900 (1600 TBW). Sequential reads across the group span 550–1000 MB/s at 128GB.
Why this configuration
A 128GB ADATA 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. ADATA 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: write-heavy secondary roles and keeping older machines useful.
Good fit: mainstream desktop and laptop builds.
Ranked list
Speeds on this page are the manufacturer's 128GB ratings where published (4 of 5 drives), not the family headline figure. 1 of the 5 are rated slower at 128GB than at their fastest capacity. Rated writes at 128GB run 150–550 MB/s.
| # | Model | Tier | Controller | Read MB/s (at 128GB) | TBW | |
|---|---|---|---|---|---|---|
| 1 |  ADATA SU900 128GB, 250GB, 500GB, 1TB, 2TB | High-end | Silicon Motion SM2258H (1-Core, 4- | 560 | 1600 | Find on Amazon |
| 2 |  ADATA SP920 128GB, 250GB, 500GB, 1TB | Mid-range | Marvell 88SS9189 | 560 | 72 | Find on Amazon |
| 3 |  ADATA SX930 128GB, 250GB, 500GB | Mid-range | JMICRON JMF670H (Comparável à um S | 550* | 280 | Find on Amazon |
| 4 |  ADATA SP610 128GB, 250GB, 500GB, 1TB | Value | Silicon Motion SM2246EM | 560 | — | Find on Amazon |
| 5 |  ADATA XPG SX8000 128GB, 250GB, 500GB, 1TB | — | Silicon Motion SM2260 (Dual ARM Co | 1000 | 640 | 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.
MLC NAND is older and costs more per gigabyte, but is very durable.
Staying with ADATA means consistent firmware, tooling and warranty handling across the range.