I have 3 Corsair RM850 powering 6 overclocked antminers.  I've noticed that a few of the pci-e wires would get very warm, near where it connects to the psu, so I switched out the wires with brand new replacement wires over a month ago.  I'm having the recurring problem again but no more pci-e wires to replace them with.  Are the wires getting very warm safe?  Should I be concerned?  The wires are warm enough that I can only touch it with my hand for about 3 seconds before it feels hot.  I've been running the machines for over 2 months now.