Are they Zeus miners? I got rid of the ones I had, they just always had a high error rate and a high reject rate.
yes all are zeus blades , those with hashra controlla on rpi are chained on one miner (13+13+13 on 1 usb port) and have 0.33% rejected rate and about 5 or 6% of HW
but the 5 others are all on 1 usb port for each with bfgminer4.3.1 for zeusminers running on a win7 system and poping 15% rejected and about 6% of HW