So I got my 10 2pacs Friday and have been struggling to get them working with any consistency

I have tried at every speed from 25mhz - 250mhz and get the same result.
It will hash for 1-3 hours and then either cgminer just quits or a random number of boards between 3-6 turn off or go zombie. It's never the same ones, cause I have been marking the ports and boards that stop working. It is completely random. Everything seems to be working fine for that first hour or so with the exception of an error that pops up occasionally on a random board that says
No valid hashes recently, attempting to reset
attempted reset got err:(0) LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED
any ideas? screenshot below

also I have one stick that won't allow me to adjust the voltage. it just show .8v per asic and 1.6v total. Adjusting the pot has no affect. So I may pull that one to see if it's causing trouble.
Yup am facing the same problem, On cgminer stratum always detect but wont pool anything after a couple of minutes it goes to Zombie