Not sure if this is old news but I removed the fan from one of mine today and in still air running LTC at 850MHz it gets barely warm. I think will go ahead and build them into a case with just a small fan pushing air out of the back.
Nope, I've been waiting for someone to verify this would work. Thanks for being the guinea pig!
I didn't want to try this myself as the Asicminer Cube will not function without a fan drawing current (it's an overheat protection thing, I don't think they have temp sensors).
I think it'll be time to cut the fan off mine tonight. It's a waste of power and sounds like a jet engine.