The structural stability of the case provides a ~5-10GHs increase in hash-rate vs not having the rig cased.
How does that work?
Possibly ? *shrugs*
All I know is, it appears I've gone from an average of 560GHs to 569GHs on that one particular rig since casing it properly. Before that, I had it laying on it's side with fans sitting directly on the cards blowing air down on them.
It's all very mysterious and sounds suspicious to be sure. I'll have more anecdotes once I get the second rig cased over the weekend.
