To me it sounds like the pump is not connected to a pwm header on your mainboard. If this is not the case and as has been suggested the internal protective circuitry is being tripped, why is this not happening on all the pumps? It seems very odd.
By the way has there been an announcement of when the H320 will be shipping?
Edited by os2wiz - 5/23/13 at 8:11am