Silicon Power UD90 1TB
Score: 80/100
Samsung 990 EVO Plus 2TB
Score: 88/100Rankings
The Samsung 990 EVO Plus 2TB is a DRAM-less NVMe SSD delivering flagship-class sequential speeds, high IOPS, low power draw and robust hardware encryption in a compact single-sided M.2 2280 form factor.
The Silicon Power UD90 1TB PCIe 4.0 SSD delivers flagship-class sequential speeds at a budget price, but its DRAM-less design and lack of a heatsink lead to thermal concerns and mixed reliability reports.
| Attribute | | |
|---|---|---|
1,000 GB | 2,000 GBbest | |
5,000 MB/s | 7,250 MB/sbest | |
4,800 MB/s | 6,300 MB/sbest | |
570,000 IOPS | 1,000,000 IOPSbest | |
600,000 IOPS | 1,350,000 IOPSbest | |
600 TBW | 1,200 TBWbest | |
5 yearsbest | 5 yearsbest | |
| ↓ lower better | — | 4.6 Wbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(5) | ||
Sequential Read Speed (MB/s) | 5000 MB/s | 7250 MB/s |
Sequential Write Speed (MB/s) | 4800 MB/s | 6300 MB/s |
Random Read IOPS (IOPS) | 570000 IOPS | 1000000 IOPS |
Random Write IOPS (IOPS) | 600000 IOPS | 1350000 IOPS |
Interface | PCIe Gen4 x4 | PCIe Gen4 x4 / Gen5 x2 |
Storage(3) | ||
Capacity (GB) | 1000 GB | 2000 GB |
NAND Type | TLC | 236-layer V-NAND TLC |
Endurance (TBW) (TBW) | 600 TBW | 1200 TBW |
Design & Build(2) | ||
Weight (g) | 8 g | 9 g |
Thickness (mm) | 3.5 mm | 2.38 mm |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the UD90 as a value champion with strong sequential performance, but caution about heat and the absence of an included heatsink.
Everyday users love the fast boot and gaming responsiveness, yet many complain about overheating, premature failures, and occasional data corruption.
“"new Value Champion" - Tom's Hardware”
“"great deal" for 1TB of PCIe 4.0 storage”
“"sudden drive death within months"”
Professional reviewers from Tom's Hardware and HotHardware praise the 990 EVO Plus for delivering flagship-class sequential speeds and impressive IOPS while maintaining excellent power efficiency and a compact single-sided layout.
Everyday users consistently highlight the drive's snappy performance, ease of installation, and ample 2 TB capacity, calling it an excellent boot and gaming drive.
