I have a crs326-24G-2S+ with 2 SFP+ S+RJ10 10Gb plugs, running on 7.2.3. On one port a Dell server with an Intel X550-T2 10 Gb card and on the other SFP+ port an Synology DS1621+ with an Intel X540-T2 card. When I test the transfer speed with iperf3 I'm getting a maximum speed off 934 Mbits/sec. With winbox looking at teh Two SFP+ ports i"m seeing a maximum of 1018 Mbits/sec. All ports have an MTU setting of 9000.
After a few minutes both SFP+ ports shutdown becasue of high temperature.
This is very bad.