StarTech.com U.2 to M.2 Adapter - for 1 x U.2 PCIe NVMe SSD - M.2 PCIe x4 Host Interface - U.2 SSD - M.2 PCIe Adapter - U.2 Drive , TAA (M2E4SFF8643)

Works perfectly and adds that extra SSD slot that sometimes is needed.

This saved my life. My Enterprise Grade Samsung PM1733 4TB worked perfectly on my Asus X870E-Plus consumer board.

a bit quirky to put together but works well with the drive once installed.

Maybe I just got unlucky. I have a spare 1TB M2 drive. I got a refurbed Dell R740XD server. Bought this adapter to use the NMVe drive. It worked fine for a while but I noticed when I booted up after installing that the fans on my server were running higher than usual and then after about an hour my server "shut off" the hard drive. Diagnostics said it was overheating. I pulled the drive out. Barely above room temp. Plus my fans went back to idle speed.

I have a bunch of 250GB NVMe SSDs pulled from Dells. I figured I'd repurpose them for some older computers that don't have NVMe slots, so I bought one of these to test, with the intent to connect the NVMe drives to the older computers' SATA ports. Lo and behold, these don't have standard SATA connectors, they have SFF-8639 connectors, which are typically used by SAS drives (server-oriented). So, forget about connecting these to standard SATA controllers; you need to connect a RAID controller with a SFF-8639 breakout cable. The especially irritating thing is that SATA drives are compatible with SFF-8639 cables, but SFF-8639 drives are not compatible with SATA cables. IE, if this adapter had a SATA connector, you could use it with SFF-8639 cables AND SATA cables, but since it's SFF-8639, it will only work with SFF-8639 cables. Now, to be fair, it is entirely my fault for not being positive that this adapter was the right thing for my needs. My one-star rating is because I can't think of any practical reason to make an adapter that simply doesn't work with SATA cables and only SFF-8639.

Great little adapter. It fits in any PC easily quickly. A worthy upgrade to any old PC

Work as advertised. I put them in a heavily used server and the database team can't tell the difference between them and the U.2 drives next to them.

I thought I'd save some money by buying a $10 Other-brand card. This connected to my 400GB Intel 750, meant to be the OS drive for my home server. After initial install, during the setup and "getting ready" phase my system would freeze, and I'm forced to hard reboot. I couldn't get past initial setup, and it took some time troubleshooting. It was either the cheap SFF-8643 card, or my drive (my drive was pulled from my working system prior). Switched to this StarTech card, everything works fine.

Using this adapter and an appropriate U.2 cable (purchased separately) to house a WD Black SN750 NVMe drive to use as a VR game library. When both cables plugged in, detected the drive immediately. After formatting, drive was benchmarked through Crystal Mark - expected read / write speeds for an NVMe drive. The adapter does not appear to impede drive performance at all, much to my relief as it takes the sting out of having an odd motherboard with a U.2, but not M.2 PCIe inputs and allows for much desired NVMe speeds without forking out ludicrous amounts for a dedicated U.2 storage device.

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I've tried a few of the cheaper alternatives for converting a M.2 NVMe to a U.2 NVMe for use in my Poweredge R640 server and all of them so far have been flaky...until now. This StarTech unit just works. I connected a PCIe Gen4 NVMe to my server which can only handle PCIe Gen3 and it was completely backwards compatible (as it should be). No complaining. No errors. No fiddling with any settings or powershell scripts or anything...I added my M.2 drives, created storage pool in Windows Server, created virtual disk, formatted and getting near max PCIe3 speeds. Just for fun, I then installed them in my other R640 that's running Proxmox and it immediately saw the drives and I was able to create a new pool with very similar results as with the Windows server. In a setting of a home lab, this allows me to use consumer NVMe drives in a server without any loss in performance. I don't think I would do this in a production environment but for testing and lab purposes, this is perfect. A simple striped pair of 4TB NVMe drives gives me 6600MB R/W. Attaching 3 different tests performed with CrystalDiskMark using 3 different test file sizes.

Funktioniert wie erwartet. Eingebaut, Kabel angesteckt (muss extra bestellt werden, ich habe dies benutzt: "CY u.2 U2 sff-8639 nvme PCIe SSD Kabel für Mainboard, Intel SSD 750 P3600 P3700 m.2 SFF-8643 Mini SAS HD"), NVMe-Disk angeschlossen, läuft. Allerdings muss das Mainboard den direkten Anschluss der SSD an den PCIe-Bus unterstützen.