UGREEN 25051 USB 3.0 to 2.5GbE Ethernet Adapter (CM648)

Easy to install and download driver from Ugreen website as in instruction manual. It was able to attain almost 2.5 GBPS with CAT 5 cable.

Working as expected

It works. I don’t know what happened to the dedicated Ethernet port on my laptop, but this thing let me not worry about it.It functions well. I don’t need 10GbE, not even the 2.5GbE that this thing provides. Since it uses USB, it doesn’t take up my only USB-C port, so that’s nice connectivity wise.I thought I would need to install some software [at the very least some drivers], but I guess I forgot how electronics work sometimes, so all I had to do was plug it in, and I was all good. Basically, easy to install.

I have two of these, used as a quick and easy way to speed up access between my main workstation and a Synology DS920+ NAS (which is now connected through the USB port and one of these dongles, rather than through an Ethernet port). I have a 10 Port 2.5Gb unmanaged Ethernet switch in between (which also has a couple of 10Gb ports). I am able to get sustained 2Gb/sec transfer rates when moving larger files. For tips on how to set things up with the Synology, search YouTube.

Makes my Synology faster; uses the Realtek chipset; runs efficient and cool.

super!👌

great item, good speed and no disconnections

raspberry pi 5 üzerinde kullanmak için aldım. usb 3.0 portuna taktım ve download 2200 mbit, upload 2300 mbit olarak kullanıyorum. linux direk tanıyor üzerindeki chipseti. yani driver kurma derdi yok.

Excellent well-made 2.5G Ethernet dongle. I was about to return the product because I thought it was not delivering the promised speed improvement. I was using iperf3 between two Windows machines connected with a 2.5G switch. The speed in one direction was great, but in the reverse it was worse than the previous 1 Gigabit Eth connection. Luckily I discovered that iperf3 does not work well on Windows, and I used ntttcp instead, as recommended by Microsoft. Now I could confirm 2.5G speeds in both directions.

I thought that I was wise to buy the cheapest (£12-15) version of the 2.5Gbs USB adapters. I thought that they have the same Realtek chip and it is just the branding what may differ. I had a wild ride with those cheapo adapters. They randomly disconnected or Linux could not even recognise them ("bad cable").They continuously reset themselves, causing the device disconnecting and appearing again on Linux. Forget about them.This adapter so far just works as I hoped it will. No disconnection issues.Connected them to Synology NAS devices and with the extra driver, they works stable and 2.35Gbs speed or about 250MB/s NFS writer speed are achievable.It works on Linux (Proxmox) and it operates stable. (Not like the cheapo version).Windows works as well, but surprisingly it works worst on Windows than on Linux!I tried this unit on a modern HP laptop and it could achieve an iperf3 test around 1-1.5Gbs. I thought maybe there is some constraints on the shared USB bus. But, on Linux, iperf3 runs on 2.35Gbs. Okay, it is maybe one device, so I tested on others. Similar experience. I tried to update the driver, but no real speed improvement. Luckily Windows was not my main objective.I was not super lucky with OPNsense. The device recognised the adapter and it works with it but it felt like that, even on the switch, the negotiated speed was 2.5Gbs, it may stuck on USB2 speed on my box as the max speed was around 360Mbs. You may be luckier, at least it works and stays stable.After all, I will order these again if I expand my 2.5Gbs network with new devices.

Funkade direkt. Kom upp i rätt hastighet utan problem.

this adapter is connecting to 100mbps while my wifi is 1gb. i made sure that all settings were correct and still, it keeps switching speeds and settings (sometimes it does connect to 1gb ) but it still Makes me angry from these continuous problems

works realllly good

Plugged it into the SteamDeck Docking Station and the SteamDeck recognised it straight away (no drivers needed) and I'm getting transfer rates of 2.35 Gbits/sec. Awesome..I also got one for my laptop and Windows11 also recognised it within about 30 seconds (again without needing drivers), and I'm getting the same 2.35 Gbits/sec transfer speeds. Double Awesome..Final extra awesome note.. I also connected it to my Proxmox server, and again no drivers needed AND it also handles vlan tagging.