I've had these blades for a bit but recently realized that even on the Blue Rev2 boards that have both oscillators populated this option isn't even present in their web interface!
Only one blade in my cluster has this, so it seems rather unique..
Check it out on the far right buttons near the bottom:
http://i.imgur.com/XjSMlW8.png And no I don't care if you see my Slush's account info, mine some for me if you'd like.

And again these are all Rev2 boards, running flawlessly so far.
Did they flash a Rev1 firmware? Is this an unlockable option they did by mistake?
I know if I click it the blade will just stall if it even works since it's a green rev and has no 2nd oscillator populated, also the voltages will need changing via replacement resistors. I have a pickit2 and will check and see if the F/W is read protected if there is enough interest in something like this. It shouldn't be like this, so who knows, maybe they forgot the protection also.