I purchased a couple of 5v and 12v and 1 27v PSU's from Ray Wu's store. The 12v and 27v seem to run without the fan and are apparently thermostatically controlled (never really had them on heavy load, so not sure if the fans will even kick in). My main concern is the 5v PSU's the fans come on straight away and stay on permanetly (no variable speed either). It happens on both the 5v PSU's. Has anyone else seen/reported this to Ray? Is there a fix, or do you just leave it on as it?