Silicon Power 4TB UD90 NVMe 4.0 Gen4 PCIe M.2 SSD R/W up to 5,000/4,500 MB/s (SP04KGBP44UD9005)
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Availability:
Only 2 left in stock, order soon!
Arrives
Sunday, Nov 2
Capacity: 4TB
Style: Standard
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
Description
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.
Digital Storage Capacity: 4000 GB
Hard Disk Interface: Raid
Connectivity Technology: NVME
Brand: SP Silicon Power
Special Feature: Backward Compatible
Hard Disk Form Factor: 2.5 Inches
Hard Disk Description: Solid State Drive
Compatible Devices: Laptop
Installation Type: Internal Hard Drive
Color: 4TB
Hard Drive: 4 TB Solid State Drive
Brand: SP Silicon Power
Series: SP04KGBP44UD9005
Item model number: SP04KGBP44UD9005AY
Item Weight: 0.282 ounces
Product Dimensions: 19.69 x 19.69 x 11.02 inches
Item Dimensions LxWxH: 19.69 x 19.69 x 11.02 inches
Color: 4TB
Flash Memory Size: 4 TB
Hard Drive Interface: Raid
Manufacturer: SP Silicon Power
Date First Available: March 25, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 2
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Capacity: 2TB
Style: Standard
I am a huge fan of SP memory and memory products. I have been buying a lot from them recently. I got this because I wanted a decently large primary storage drive for my new main pc. This drive is nice and fast, OS boots in seconds, I haven't had any problems with any of my systems recognizing SP drives or memory. Installation was a snap, and performance was as advertised. I've built a handful of systems both AMD and Intel based and the Silicon Power nvme drives I've been using just work. They don't have to be the very fastest drives out there, but the Gen3 are plenty fast for my needs, even gaming. These are fantastic options that don't cost a ton.
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Reviewed in the United States on March 22, 2025 by P. Wells
Capacity: 2TB
Style: Standard
The Silicon Power 2TB UD90 NVMe Gen4 SSD is a beast! With read/write speeds of up to 5,000/4,800 MB/s, this drive is insanely fast. Boot times, game loading, and file transfers are all lightning quick now. It performs just as well as more expensive drives but at a fraction of the cost. Installation was simple—plug and play with no issues. It works perfectly on my Gen4-capable system, and I've seen a noticeable improvement in overall system responsiveness. For anyone looking to upgrade their storage with high performance and plenty of capacity, this SSD is a no-brainer. Highly recommend!
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Reviewed in the United States on February 6, 2025 by John Campini
Capacity: 1TB
Style: w/ Heatsink
The heat sink truly proved to be worth every penny. It kept everything cool, even during the intense gaming sessions that really pushed my PC to its limits. On top of that, it looks fantastic—a real delight to have in my setup. Formatting was a breeze, which was such a relief. Overall, the M.2 drive is excellent, and I wholeheartedly recommend it to anyone looking for a reliable source of storage.
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Reviewed in the United States on September 21, 2025 by Aaron Navarro Hernandez
Capacity: 1TB
Style: Standard
Somehow, windows 11 fried 3 different computer NVME drives on 3 different gaming computers in my house. So, bought these and they work great. Fast.
Reviewed in the United States on September 30, 2025 by Marek Sokt
Capacity: 4TB
Style: Standard
I've had this for about 2 years now and it's still holding strong. I was sceptical at first with this brand. But after I put a 512gb 2.5ssd by this brand to some heavy use, I've been a bit of a fan. This 4tb drive is no different. Easy installation, fast performance, noiseless (it's an ssd), and small design are all great. It does slow down with larger transfers.
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Reviewed in the United States on July 31, 2025 by Matt R.
Capacity: 4TB
Style: Standard
Absolutely, here’s the review rewritten from your perspective, making it clear that you also experienced the slow speeds and recommend staying away from this drive: --- **Avoid This Drive – Slow and Disappointing!** I didn’t personally buy multiple Silicon Power drives in the past, but after seeing detailed reviews and specs, I expected the UD90 to be a decent budget SSD. It’s advertised with a Phison E21T controller and TLC NAND, boasting speeds of 5000MB/s read and 4500MB/s write in SLC mode. On paper, it looked like a solid choice with a 3000TBW rating. However, after putting it to use, I immediately ran into severe slowdowns. Copying large files (about 1TB) exposed just how bad the performance is—sustained writes quickly dropped to an abysmal 150MB/s–250MB/s. Further testing confirmed that the SLC cache is incredibly small (only 15GB–65GB), and once it runs out, the drive slows to a crawl. The controller struggles to flush the cache efficiently, making recovery painfully slow. Benchmarks show that outside of the SLC cache, speeds tank to around 250MB/s for reads and 150MB/s–250MB/s for writes. This strongly suggests the drive is using QLC NAND instead of TLC, which explains the poor sustained performance. QLC not only has lower endurance but also significantly throttles after the cache fills up—impacting both write and read speeds. And for what? To save $10–$20 over a proper TLC drive? Absolutely not worth it. Temperature-wise, it stays reasonable at around 49°C with a heatsink, but that doesn’t make up for the glaring performance issues. If this drive actually used TLC with a proper cache, it could have been a great value option. Instead, it’s a classic case of cutting corners at the cost of real-world usability. I also reached out to Silicon Power’s support to confirm the NAND type and explain the performance problems, but after three days with no response, I decided to dig into the issue myself. In the end, I avoided further frustration and went with a slightly slower but *far* more reliable TLC + DRAM drive (TeamGroup MP34) for just $20 more. If you’re considering this drive—don’t. The performance limitations make it a terrible value, and there are far better options out there.
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Reviewed in the United States on February 18, 2025 by Jordan
Capacity: 4TB
Style: Standard
I purchase this 4TB SP UD90 back in '23. I found the speed adequate for my needs. Worked like a champ until one day it did not. I was using it as a secondary drive for my steam games. Disappeared from BIOS, nothing in disk manager. Well I figure I'd see if SP would honor their warranty and they absolutely did. Went through the RMA process and two weeks later I have a replacement UD90. I purchased another 4TB UD90 and a 2TB 2230 UD90 (For my steam deck.). I'm very please with this company and back it up with my wallet.
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Reviewed in the United States on July 19, 2025 by Jonas Pablo
Capacity: 2TB
Style: Standard
I was hesitant because I'd never used this brand before. The others appealed to me more, but the storage space and affordability surpassed many others on the market. I've already installed it on a new PC, and everything works perfectly, stable, and at high speed.
Reviewed in the United States on September 7, 2025 by Gregor Gonzalez Gregor Gonzalez