How come no one seems to have tried using Thunderbolt for 40gbps networking?

Framework Desktop
23

It absolutely does not. :slight_smile:

I have two Framework Laptop 13 mainboards connected over 20Gbps thunderbolt, and I can get 18Gb on the wire using iperf3 with a single stream.

[  5] local 10.100.1.2 port 49098 connected to 10.100.1.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  2.11 GBytes  18.1 Gbits/sec   35   4.12 MBytes
[  5]   1.00-2.00   sec  2.13 GBytes  18.3 Gbits/sec    4   4.12 MBytes
[  5]   2.00-3.00   sec  2.14 GBytes  18.4 Gbits/sec    1   4.12 MBytes
[  5]   3.00-4.00   sec  2.13 GBytes  18.3 Gbits/sec    1   4.12 MBytes
[  5]   4.00-5.00   sec  2.13 GBytes  18.3 Gbits/sec    0   4.12 MBytes
[  5]   5.00-6.00   sec  2.13 GBytes  18.3 Gbits/sec    0   4.12 MBytes
[  5]   6.00-7.00   sec  2.11 GBytes  18.2 Gbits/sec    1   4.12 MBytes
[  5]   7.00-8.00   sec  2.10 GBytes  18.0 Gbits/sec    3   4.12 MBytes
[  5]   8.00-9.00   sec  2.12 GBytes  18.2 Gbits/sec    0   4.12 MBytes
[  5]   9.00-10.00  sec  2.13 GBytes  18.3 Gbits/sec    0   4.12 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  21.2 GBytes  18.2 Gbits/sec   45            sender
[  5]   0.00-10.00  sec  21.2 GBytes  18.2 Gbits/sec                  receiver