Silicon Power UD90 1TB
Score: 80/100
Samsung 990 EVO Plus 1TB
Score: 70/100Rankings
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.
The Samsung 990 EVO Plus 1 TB is a high-performance PCIe 4.0 SSD that also supports PCIe 5.0 x2, offering flagship-class sequential speeds and strong random performance while remaining power-efficient, but it lacks onboard DRAM and includes a minimal accessories package.
| Attribute | | |
|---|---|---|
1,000 GBbest | 1,000 GBbest | |
5,000 MB/s | 7,150 MB/sbest | |
4,800 MB/s | 6,300 MB/sbest | |
570,000 IOPS | 850,000 IOPSbest | |
600,000 IOPS | 1,350,000 IOPSbest | |
600 TBWbest | 600 TBWbest | |
5 yearsbest | 5 yearsbest | |
| ↓ lower better | — | 4.3 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 | 7150 MB/s |
Sequential Write Speed (MB/s) | 4800 MB/s | 6300 MB/s |
Random Read IOPS (IOPS) | 570000 IOPS | 850000 IOPS |
Random Write IOPS (IOPS) | 600000 IOPS | 1350000 IOPS |
Interface | PCIe Gen4 x4 | PCIe 4.0 x4 |
Design & Build(2) | ||
Weight (g) | 8 g | 9 g |
Thickness (mm) | 3.5 mm | 2.54 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 praise the 990 EVO Plus for its flagship-class sequential speeds, impressive power efficiency, and the combination of Samsung's latest 236-layer V-NAND with a 5 nm controller, while noting the absence of DRAM and occasional BIOS compatibility quirks.
Everyday users rate the drive very highly (around 4.8-4.9/5), highlighting blazing-fast boot times and noticeable system responsiveness, with occasional complaints about missing mounting screws and BIOS issues.
