Overview
The Silicon Power UD90 (Micron B47R) 1 TB is a PCIe 4.0 NVMe M.2 SSD targeting the mid-range market. It features TLC NAND flash and a Phison E21T controller, with a DRAM-less design that leverages 64MB of Host Memory Buffer (HMB). Released in May 2022, this drive offers a balance of performance and affordability for gamers and content creators who need a 1TB upgrade without breaking the bank.
Compatibility Guide
The UD90 uses the M.2 2280 form factor and connects via PCIe 4.0 x4. It is backward compatible with PCIe 3.0 slots, but speeds will be limited to PCIe 3.0 levels. Ensure your motherboard has an M.2 slot that supports PCIe 4.0 for full performance. The DRAM-less design requires NVMe 1.3 or later for HMB to function; modern Windows and Linux systems support this. No additional power connectors are needed as M.2 slots provide power.
Product Info
Launched in May 2022, the UD90 1TB is priced around ¥41,433 (as of August 31, 2026, on Yahoo Shopping). It sits in the mid-range tier, offering PCIe 4.0 speeds at a cost lower than DRAM-equipped rivals. The combination of TLC NAND and Phison E21T delivers solid sequential read/write performance for everyday tasks. Warranty details are not confirmed in our sources; check the manufacturer's site.
Best Use Cases
Gaming storage: Ideal for gamers with PCIe 4.0 motherboards who want faster load times. The HMB helps maintain snappy performance in most games. Not recommended for heavy write workloads due to unknown TBW. Content creation scratch disk: Suitable for storing project files and media. 1TB provides ample space for photo and video editing. Budget system build: A cost-effective upgrade for a secondary PC or HTPC. Who should avoid: Users requiring sustained high random write performance (e.g., database servers) should opt for a DRAM-equipped SSD.
Things to Consider
The lack of DRAM means random write performance may be lower than DRAM-based SSDs, though HMB mitigates this. If you plan to use this as an OS drive, consider whether the difference matters to you. TBW is not publicly listed, so long-term endurance is uncertain. For maximum speed, a PCIe 4.0 slot is essential; using PCIe 3.0 halves bandwidth. Price fluctuations are common. ## FAQ
Q: Can I use this SSD in a PS5? A: The PS5 supports M.2 NVMe SSDs, but this drive lacks a heatsink. You'll need to add one. Also, its read speed may not meet Sony's recommended 5,500MB/s; check official compatibility lists. Q: Does it come with cloning software? A: We have no information on bundled software. You may need to use third-party tools. Q: Will it work in a PCIe 3.0 slot? A: Yes, but performance will be capped at PCIe 3.0 x4 speeds (~3,500MB/s).
