Does the XGS1250-12 have/use active cooling?

i've had to RMA two XGS1250-12 units and currently on my thrid, the previous ones just cooked themselves to the point where the 10G Ethernet ports just stopped working, there seems to be a serious design flaw on these, i've had to put an 80mm 5v fan at one end to blow air across the until just to keep it cool.