Unfortunately that's non-DAC copper cabling life it seems. They build them to work at the rated speed at the maximum rated distance (on the transceiver, not the

Unfortunately that's non-DAC copper cabling life it seems. They build them to work at the rated speed at the maximum rated distance (on the transceiver, not the spec) and none of them appear to link train to reduce the power output over shorter runs. If you use a DAC they usually run cool, and optical is even cooler.