Best 128GB SATA MLC DRAM SSDs
There are 26 128GB SATA MLC DRAM SSDs compared here. The fastest is the ADATA SU900 at 560 MB/s read at 128GB. Sequential reads across the group span 400–560 MB/s at 128GB.
Why this configuration
A 128GB SATA MLC DRAM SSD is a legacy high-endurance choice. These older MLC SATA drives are slow by today's standards but exceptionally durable, which is why they still appear in always-on and write-heavy roles.
At 128GB this is really a boot or cache drive rather than a main library.
Usually chosen for: keeping an older system alive, or a rugged secondary/logging drive.
Good fit: workstation and creative loads that hammer random I/O; budget upgrades, older PCs and second drives.
Look elsewhere for: large-file creative work where NVMe pulls ahead.
Ranked list
The top 20 of 26 are listed. The full SSD catalogue filters on every spec.
Speeds on this page are the manufacturer's 128GB ratings where published (12 of 26 drives), not the family headline figure. 2 of the 26 are rated slower at 128GB than at their fastest capacity. Rated writes at 128GB run 150–520 MB/s.
| # | Model | Tier | Controller | Read MB/s (at 128GB) | TBW | |
|---|---|---|---|---|---|---|
| 1 |  Samsung 840 PRO 128GB, 250GB, 500GB | Top-tier | Samsung's 3-Core MDX Controller | 540 | 73 | Check price on Amazon |
| 2 |  ADATA SU900 128GB, 250GB, 500GB, 1TB, 2TB | High-end | Silicon Motion SM2258H (1-Core, 4- | 560 | 1600 | Find on Amazon |
| 3 |  Crucial M500 128GB, 250GB, 500GB, 960GB | High-end | Marvell 88SS9187 | 500* | 72 | Find on Amazon |
| 4 |  ADATA SP920 128GB, 250GB, 500GB, 1TB | Mid-range | Marvell 88SS9189 | 560 | 72 | Find on Amazon |
| 5 |  Crucial BX300 128GB, 250GB, 500GB | Mid-range | Silicon Motion SM2258 | 555* | 160 | Find on Amazon |
| 6 |  Crucial M550 128GB, 250GB, 500GB, 1TB | Mid-range | Marvell 88SS9189 | 550 | 72 | Find on Amazon |
| 7 |  Crucial M550 mSATA 128GB, 250GB, 500GB | Mid-range | Marvell 88SS9189 | 550 | 72 | Find on Amazon |
| 8 |  ADATA SX930 128GB, 250GB, 500GB | Mid-range | JMICRON JMF670H (Comparável à um S | 550* | 280 | Find on Amazon |
| 9 |  Kingston SSDNOW KC400 128GB, 250GB, 500GB, 1TB | Mid-range | Phison PS3110-S10 (4-Core, 55nm CM | 550 | 1600 | Find on Amazon |
| 10 |  OCZ VECTOR 128GB, 250GB, 500GB | Mid-range | Indilinx IDX500M00-BC Barefoot 3 | 550 | 36.5 | Find on Amazon |
| 11 |  OCZ VECTOR 150 128GB, 250GB, 500GB | Mid-range | Indilinx IDX500M00-BC Barefoot 3 | 550* | 91 | Find on Amazon |
| 12 |  OCZ VECTOR 180 128GB, 500GB, 960GB | Mid-range | OCZ Barefoot 3 M00 | 550* | 91 | Find on Amazon |
| 13 |  SanDisk EXTREME II 128GB, 250GB, 500GB | Mid-range | Marvell 88SS9187 | 550* | 80 | Find on Amazon |
| 14 |  Plextor M5 PRO 128GB, 250GB, 500GB | Mid-range | Marvell 88SS9187 | 540 | — | Find on Amazon |
| 15 |  Crucial BX100 128GB, 250GB, 500GB, 1TB | Mid-range | Silicon Motion SM2246EN | 535* | 72 | Find on Amazon |
| 16 |  OCZ VERTEX 4 128GB, 250GB, 500GB | Mid-range | Indilinx(IDX400M00-BC) Everest 2 | 535 | — | Find on Amazon |
| 17 |  ADATA SP610 128GB, 250GB, 500GB, 1TB | Value | Silicon Motion SM2246EM | 560 | — | Find on Amazon |
| 18 |  OCZ RADEON R7 128GB, 250GB, 500GB | Value | OCZ Barefoot 3 M00 | 550* | 43.8 | Find on Amazon |
| 19 |  Transcend 370 128GB, 250GB, 500GB, 1TB | Value | Transcend TS6500 (rebranded Silico | 550 | 1180 | Find on Amazon |
| 20 |  OCZ VERTEX 460 128GB, 250GB, 500GB | Value | Indilinx Barefoot 3 M10 | 545* | 21.9 | 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.
SATA III tops out around 550 MB/s, but it is the cheapest interface and fits any 2.5-inch bay or older laptop.
MLC NAND is older and costs more per gigabyte, but is very durable.
An onboard DRAM cache keeps the flash mapping table on the drive, holding random performance steady under sustained load.
Common questions
Is SATA fast enough in 2026?
For an OS, apps and most games you won't notice the difference versus NVMe in daily use. NVMe pulls ahead mainly on large file transfers and load-heavy creative work.