I just got my 2pacs going and I am getting a lot of hardware errors on one of them. I read that it could be that I need to up the voltage? But I'm unsure how to I only see how to change the frequency:

 0: GSD 10011117: COMPAC-2 225.00MHz HW:13 | 25.81G / 24.70Gh/s WU:344.8/m
 1: GSD 10011119: COMPAC-2 225.00MHz HW:0 | 29.89G / 24.21Gh/s WU:338.3/m
 2: GSD 10011118: COMPAC-2 225.00MHz HW:8196 | 43.09G / 24.96Gh/s WU:138.6/m