Review on 💻 TRENDnet USB-C 3.1 To 2.5GBase-T Ethernet Adapter: Fast and Reliable Connection Speeds at 2.5Gbps with VLAN Support - Black, TUC-ET2G by Josh Endricko

Disclaimer. I work in the technical field as a Site Reliability Engineer and have extensive knowledge in the areas of hardware, storage and networking. i am not new I just received and tested the 5Gbps adapter 5 minutes ago. Although it is connected as expected, it does not work as advertised. In repeated tests (even after reading the same file repeatedly to put it in the ZFS read cache), I couldn't get more than 400-450 Mbps (50-60 MB/s) on receive and only 3, 5 Gbit/ss (335 MB/s) when sending. This was a 24-disk ZFS file server with an Optane SSD for SLOG that could easily read and write >10Gbps (typically 15-20Gbps is routed through the dedicated 10Gbps interface). I've tried changing every possible setting, disabling thermal throttling, flow control, enabling jumbo frames, doubling and then quadrupling the buffers, nothing made a difference. There was a HARD limit to both sending and receiving, and it sounded like wine every time data was pushed through the adapter. I tried both on my Dell WT19TB docking station and directly on my Dell XPS 17 9700 laptop, it made no difference. the performance is worse than the realtek 1gbps network card in the docking station, so unusable for me. Will send it back. The only reason I gave this 2 stars is the transmit power, if it was as bad as the receive end I would give this one 1 star. This laptop replaced an old desktop I used for editing that had an ASUS XG100C 10Gb/s adapter that worked fine at 10Gb/s (along with 2.5 and 5Gb/s when I used those speeds selected). My network consists of 2 Mikrotik switches interconnected at 10Gbps. Interface the file server is connected to a single connected 20 Gbps (10x2) link and then to Cat. 6 through my house. Using an RJ45->SFP+ adapter tested and certified for 1/2.5/5/10 Gb/s bi-directional transmission. It's definitely a problem with the adapter, the attached pictures show it's maxed out. As mentioned, this thing works HOT. Almost a fan has to be connected, it gets very hot. And it only pushes 1-2 GB of traffic through.