I've been running mine on high clock for the past 2 weeks.
Same here. I've had one running overclock with stock cooling for about 11 days with no issue.
Good for you guys ! Mine -> soon as i click the "Clock" button and then "Refresh" button .. all ASICs stop mining even if i go back to "Clock selected: Low" mode ... only fix is to power-cycle the PSU.
Any advice here ? - I have one Cube on one 750W PSU ...