yeah well, mine ran for years with a Solarflare SFN5122, a Mellanox MCX354A (with 40GbE DACs) or a SuperMicro 10GbE dual port X710…but that’s because I had to find cards that have known low heat output (ballparking it to less than the ~20w TDP or similar to the E9173 quad port GPUs that used to be on them, but those boards are GCN4 and had a low profile cooler). I also had SolarFlare 7 series and Celsio Terminator T4 cards lock up the t740 within 20 minutes due to heat build-up. The same cards ran fine if I leave the t740 open, card connected via a PCIe slot extender and away from the chassis with a USB powered fan slapped directly on top of the heat sink for the card, so I know it’s a cooling and not a power draw issue.Mine T740 runs just fine with quad sfp+ xl710 with all ports used and two of those ports use rj45 10g sticks.
Once again, it depends on which card you have, and whether it can withstand the effects of having almost no active airflow path in the enclosure for hours, if not days or weeks at a time.
Last edited: