Have 2 miners on this and they seem to work fine for a few hours and then crash :

09:29:41:752   bf3e6740   watchdog - fminer thread hangs
09:29:41:752   bf3e6740   em hbt: 0, fm hbt: 130832,
09:29:41:752   bf3e6740   Miner thread hangs, need to restart miner!

Too much OC ?
Also ... the USB seems hot ... doesn't it get damaged in time ?