650 = 450 gh/s
687 = 480 gh/s ( the best I get)
700 = 460 (I see it getting Blabber out of 2 dies ) which causes it to not work efficiently

Interesting, I also got my best OC at 687.

Strom2k5 What rev ?, I'm on 1.1

Rev 1.2

How much power are you drawing at 687?

It fluctuates from 555-580