If 2Pacs are dropping out, try adjusting the core voltage up slightly. More voltage tends to mean more stability - but also more heat, so adjust only a little bit at a time.
i been doing that last couple of days, they were dropping out withing 10 15 minutes after the last adjustment.
10/19 now droppping even sooner all 4 go out within hours
Try hot plug sequence wont work
Restarting CGMiner makes them go zombie
Reinstalled everything for the 3rd time dont help
Adjusting voltage dont help
Tried 3 different computers
@CADuke I am running 4 of them on a 16 hub