Do you have a corsair power supply with corsair link(looks to be ANTEC)?
If not, ignore it. If you have 3.3 @ 0 and +5 at 1.27, your system would instantly crash.
Every thing USB runs from the 5 volt lines so you would know if they got that low.
Nope, I don't have a Corsair power supply. It is an Antec and I am only using the Corsair Link software so I can monitor my H80i. I don't have the physical module. I was wondering why it wasn't crashing... so is it just the software getting incorrect readings? Also, my Corsair H80i is running off USB 2.0 on the motherboard. Is it possible the warnings are about the H80i not getting enough power?