>>106986466
There's definitely some airflow, just apparently not enough to cool an X540. Though honestly now that I'm looking at power consumption metrics, it's no wonder I was having issues. The X540 consumes 15W at fucking idle?

ConnectX-4 25Gb cards appear to consume around 10W at full load. The X710 with 4x 10Gb ports seems to be around the same, but it's also a bit more expensive.