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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)

  • Based on 3,101 reviews
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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon
Arrives Tuesday, Mar 24
Order within 8 hours and 37 minutes
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Capacity: 4 TB


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


Digital Storage Capacity: 4000 GB


Hard Disk Interface: Raid


Connectivity Technology: NVME


Additional Features: Backward Compatible


Hard Disk Form Factor: 2.5 Inches


Compatible Devices: Laptop


Read Speed: 5000 Megabytes Per Second


Media Speed: 4500 megabits_per_second


Cache Memory Installed Size: 4


Data Transfer Rate: 5000 Megabytes Per Second


Form Factor: M 2


Hardware Connectivity: Solid State Drive


Hard-Drive Size: 4 TB


Item Weight: 8 Grams


Number of Items: 1


Unit Count: 1.0 Count


Customer Package Type: FFP


Brand: SP Silicon Power


Model Number: SP04KGBP44UD9005AY


Hard Disk Description: Solid State Drive


Built-In Media: solid state drive


Model Name: SP04KGBP44UD9005


Manufacturer: SP Silicon Power


Global Trade Identification Number: 45


UPC: 886576070445


Warranty Description: 5-year limited warranty


Installation Type: Internal Hard Drive


Color: 4TB


Enclosure Material: Silicone


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Mar 24

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.

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Similar Products

Top Amazon Reviews

    • fantastic value
Capacity: 2 TB 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. ... show more
Reviewed in the United States on March 22, 2025 by P. Wells
    • Works Well- Has Suspected Issue - Likely my fault
Capacity: 2 TB Style: Standard
Suspected drive failures. 100% Utilization on bootup, for minutes, with very little data transfer. Will revise rating upward if customer service handles this appropriately. Update: Turn out the suspected issue is likely bad partitioning and lack of free space for windows.
Reviewed in the United States on January 29, 2026 by brendan
    • Impressive speed and great capacity
Capacity: 1 TB Style: Standard
The 1TB Silicon Power UD90 surprised me with its speed and stability. Read and write speeds are excellent, and you'll notice the difference immediately when booting up your system or transferring large files. Installation was easy thanks to the M.2 form factor, and the compact design fits perfectly in my PC. Furthermore, it offers a great balance between performance and price, making it an ideal upgrade for improving both everyday use and gaming. ... show more
Reviewed in the United States on November 25, 2025 by Jonathan Céspedes
    • Blazing Fast and Great Value!
Capacity: 2 TB 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! ... show more
Reviewed in the United States on February 6, 2025 by John Campini
    • Great performance for the money. Love the 4TB capacity.
Capacity: 4 TB Style: Standard
Had it plugged in and running in about 2 min. 7GB read and about 4.5GB write. Fast enough for me! Tried some really long writes and it dipped to 500MB/sec once in a while but not less than that. That tells me that it's probably TLC nand and not QLC (I was a little worried about that cause I couldn't confirm). I know the 2TB and smaller are all TLC so logically the 4TB should be also but wasn't 100% sure. Hit a max. of 60 degrees C (140 F) so that's not too bad. It sure feels nice to have a 4TB drive that is FAST!......and doesn't cost an arm and a leg. It's great to see SSD prices coming way down in the last several months. SP is not a top brand but I've never had a problem with any of the dozen or so components I've purchased over the last 5 or 6 years so I've gotten to trust them. They tend to offer comparable performance at significantly lower cost. So far I'm really happy with this SSD and highly recommend it. ***Update*** It's now a few months later and I thought I would add a little more information. I bought a Beelink SER6 miniPC recently. It came with a bottom-of-the-barrel 512GB QLC SSD (slow and hot). I wanted to upgrade it right away as I had a few other (much better) SSD's kicking around. I tried 2 of them but they would NOT fit - too thick. The 4TB UD90 was PERFECT. It is single sided and very thin. The fact that there is very limited room in this PC so that you cannot even install a decent heat sink, makes it imperative that the SSD runs fairly cool. The UD90 does that along with great speed so it was the perfect upgrade for my new mini computer. So glad I hadn't already set it up for another purpose. So, if you need a great priced, fast SSD to install in tight spaces this is the perfect choice. ... show more
Reviewed in the United States on May 3, 2023 by Baz
    • False Advertising: Not TLC but QLC NAND – Incredibly Slow Performance
Capacity: 4 TB 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. ... show more
Reviewed in the United States on February 18, 2025 by Jordan

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