The MK5 is a 3 Channel PDU with a single 3 pin fan header. It is designed to take 12V input and output 5V on each channel. The fan header is supplied directly from the input of 12V. Each channel is capable of outputting 2A @5V for 30W total output.
The MK5HP is a 6 Channel PDU with a single 3 pin fan header. It is designed to take 12V input and output 5V on each channel. The fan header is supplied directly from the input of 12V. Each channel is capable of outputting 2A @5V for 60W total output.