I own one of these and have been mining non stop for almost a week now. Everything smooth. Question: what should be the maximum operation temperature? I ask because I like to set the fans to 50% or 60% so its not too noisy, and temperature has been at around 30C (33C tops).

I think I read somewhere the limit is 70C, but I don't want to fry it 

Where did you get it? These things are pretty rare on the market. I have not seen any wholesaler sell these for a very long time.