SP Silicon Power
Silicon Power 4TB UD90 NVMe 4.0 Gen4 PCIe M.2 SSD R/W up to 5,000/4,500 MB/s (SP04KGBP44UD9005)
*Price sourced from Amazon.com. Last updated 2026-05-23. Price and availability subject to change.
Give your system the power of PCIe 4.0 with the budget-friendly UD90. Providing the best bang for your buck, it reaches read speeds up to 5,000MB/s and write speeds up to 4,500MB/s. It also boasts 2x faster data transfer rates than its predecessor, PCIe 3.0, for sustained use and dependable performance. With this much efficiency, the UD90 allows you to maximize your creative output at an unbeatable value.
SpecPicks Verdict
SpecPicks classifies Silicon Power 4TB UD90 NVMe 4.0 Gen4 PCIe M.2 SSD R/W up to… as a solid pick with broad community endorsement in the ssds & storage category, based on 3,427 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. SP Silicon Power's positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for ssds & storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Highly rated — 4.5★ average across customer reviews
- ✓ Large, well-vetted feedback pool (3,427 reviews)
- ✓ 5-year limited warranty
- ✓ Backed by SP Silicon Power's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- To bolster its multi-tasking factor even further, the UD90 takes advantage of increased bandwidth when used in conjunction with motherboards equipped with PCIe 4.0 slots. In fact, it has nearly double the bandwidth of PCIe 3.0 for shorter download times and the ability to download more files within the same amount of time.
- An SSD's speed is meaningless without the ability to handle that speed reliably. The UD90 achieves improved sequential read/write and random read/write performance with support for SLC Caching. At the same time, it supports low density parity check (LDPC) coding to ensure accuracy of data transmission and reliability of data access.
- The UD90 supports RAID to protect data in the case of a drive failure. It's also equipped with built-in E2E data protection for enhanced data transfer integrity. Unexpected things can happen at any moment, but the UD90 is prepared for them with your data at its utmost priority.
- 5-year limited warranty
Full Specifications
| Brand | SP Silicon Power |
|---|---|
| Color | 4TB |
| Model Name | SP04KGBP44UD9005 |
| Read Speed | 5000 Megabytes Per Second |
| Unit Count | 1.0 Count |
| Form Factor | M 2 |
| Media Speed | 4500 megabits_per_second |
| Model Number | SP04KGBP44UD9005AY |
| Built-In Media | solid state drive |
| Hard-Drive Size | 4 TB |
| Mfr Part Number | SP04KGBP44UD9005AY |
| Number of Items | 1 |
| Special Feature | Backward Compatible |
| Installation Type | Internal Hard Drive |
Ready to buy?
Silicon Power 4TB UD90 NVMe 4.0 Gen4 PCIe M.2 SSD R/W up to 5,000/4,500 MB/s (SP04KGBP44UD9005) is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-23. Price and availability subject to change.
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