Now that I think about it, lately it's been fine. Fans don't come on when powering an external 4k monitor under normal use anymore. However, I'm not sure wheth

Now that I think about it, lately it's been fine. Fans don't come on when powering an external 4k monitor under normal use anymore. However, I'm not sure whether that's due to a recent software update or the fact I recently switched the cable I use from HDMI to DisplayPort.