This was from the S3 thread and not sure why I didn't think of this instead of playing around with the freq's - but it worked. Got my unit I had to set at 212 freq to get 420 up to the 440's at the 218. Anyone with under performing units might try.
I reflashed both of my units, and so far, I cant really see a change. With underclock at 212.50 I was getting 420-430 gh/s and I put them back up to 218.75 and am getting 442 gh on each.