Silicon Power
Silicon Power UD90
NVME · 2TB · Released May 20, 2022
Silicon Power builds the UD90 without a DRAM cache, relying on Phison's E21 controller and TLC NAND to still reach 5000/4800 MB/s over PCIe 4.0 — slower than DRAM-equipped Gen4 drives but well ahead of any SATA option. Its 1200TB TBW rating and 5-year warranty are unusually generous for a DRAM-less design, suggesting a mainstream rather than bargain-bin positioning. It suits users wanting NVMe speed gains over SATA without paying for a DRAM cache they may not need for typical desktop use.
From $245.97 at Amazon.ca · captured 2026-08-02
Specifications
- Capacity
- 2TB
- Interface
- NVME
- Sequential read
- 5000 MB/s
- Sequential write
- 4800 MB/s
- PCIe generation
- 4
- Form factor
- M.2 2280
- NAND type
- TLC
- DRAM cache
- No
- Controller
- Phison E21
- Endurance (TBW)
- 1200 TB
- Warranty
- 5 years
Capacities
| Capacity | Part number | Current best price |
|---|---|---|
| 250GB | — | — |
| 500GB | — | — |
| 1TB | SP01KGBP44UD9005 | $245.97 at Amazon.ca · captured 2026-08-02 |
| 2TB | SP02KGBP44UD9005 | $399.97 at Amazon.ca · captured 2026-08-02 |
| 4TB | — | — |
Sources
Every spec above was pulled from one of these — a field a source didn't state was left off rather than estimated.