Posted 18 October 2011 - 12:27 PM
I've never seen a motherboard with northbridge or southbridge liquid cooling built into the motherboard. High end models of current motherboards sometimes have large heatsinks over some of the more hot components. If the CPU/Chassis fans fail and they are plugged into the motherboard, the motherboard will either see it has no connection to the fan or it will see a connection but no fan RPM's. In the case of the CPU fan, the motherboard will either refuse to boot without a fan, trip an alarm, or your CPU will heat up until the CPU automatically shuts itself down. Case fans are different, they can be plugged into the motherboard or attached directly to the PSU using a molex connector. If the case fans are plugged into the PSU, there is no way to tell without looking at the fans or observing higher temperatures within the case.