Silicon Power 2TB UD90 NVMe 4.0 Gen4 PCIe M.2 SSD R/W up to 5,000/4,800 MB/s (SP02KGBP44UD9005)

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.

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.

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.

Needed more space in my computer, this nvme SSD works great and had fast loading files abd booting the laptop.

silicon power is a great budget brand, no cache but perfect for storage

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.

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.

Great quality at a good price(pre 2025 AI inflation).

J'ai acheté ce M.2 afin d'évoluer mon vieil ordinateur qui accepte ce type de M.2. Avant j'avais un vieux SSD Samsung 840 512 GB. Il commençait à avoir des bad sector. Il avait presque 10 ans. Sa retraite arrivait... Ce M.2 travaille bien. Il tient ses promesses pour la vitesse de lecture et d'écriture. Je constate une différence notable de vitesse avec l'ancien SSD Samsung. J'ai installé dessus Windows et jeux que je joue régulièrement. Il chauffe peu même s'il est à moins de dix centimètre de la carte vidéo.

Verkar fungera bra, hastigheter enligt utlovat

Tres bon disque dur. Utilisé 24/7 et toujours fonctionnel

I ended up returning this drive, not because anything was wrong with it but because I decided I needed more storage and went for a 2TB version and a slightly different model instead. The 1TB unit arrived quickly and in perfect condition. I already use Silicon Power RAM and another of their SSDs, and they have all been reliable and well priced. Based on my experience with the brand, I have no hesitation recommending this drive.

I ordered the 'Silicon Power 2TB UD90 NVMe 4.0 Gen4 PCIe M.2 SSD R/W' because I needed an NVMe drive to try out in the 'UGREEN M.2 NVMe Enclosure Adapter, 10Gbps USB C 3.2 Gen2, Tool-Free Portable Aluminum External Reader for M and M&B Key' that I had ordered month or so ago. I wanted something a little smaller physically for an external data storage project, and with more and more computers and laptops using NVMe these days it seemed to make sense. I use three brands of storage media, and over the years I have often used Silicon Power mechanical hard drives. I had never purchased a Silicon Power SSD, so I decided to try it out, based on many years use of, and not a single failure of, Silicon Power Hard Drives, and because of the excellent price compared with the other nearest spec NVMe drives. I should add that my computers are all Linux systems. My main system sometimes is not happy detecting external drives. However, I slid this Silicon Power UD90 NVMe into the UGREEN Adapter case and plugged the cable into a USB 3 socket. The Linux system saw it immediately and offered to mount it. This Silicon Power NVMe drive is working well and is excellent as an external USB drive. Data transfer rates seem pretty consistent for good quality SSDs, and I suspect if I had it placed in a proper M.2 port rather than running on USB 3, the thing would fly! It has no problem transferring video files of several GB size from my camera's card. Write speeds are obviously not realistic because they are bottlenecked by running through USB, althought they certainly don;t seem slow. I don;t do benchmarks - I rely on 'what I see happening'. Read speeds and saves from editing videos are excellent. As it is, I will probably look for a 2TB or 4TB Silicon Power NVMe drive to use as the main drive in any of my systems next time I need to update. Based on my rather limited (time) experience so far I reckon this NVMe is good value and I'll probably buy another shortly if the price stays similar.