I am not sure why, but one of my boards works for 30m - 3H after a restart and then moves at 100 GH/s from 700 GH/s. Anyone facing the same issue?
Theres a bad firmware going around, it steals your hashes. Update or refresh from their site. I noticed a similar hashrate issue today, was only getting 1.5th consistenty pool side, refreshed and switched pools, fine now.