For additional information, I disabled Corsair Service and it indeed lowered the idle voltage to <1 V. All other monitor software did not peg the idle voltage out.
However, I lost connection to:
Commander Pro and all things attached to it. (RGB strips, 3x LL120 RGB fans)
2 x Veng Pro RGB RAM sticks
H115i Platinum AIO (USB connections going through Command Pro)
Basically anything connected internally.
I retained connection to all USB peripherals: Void Pro RGB Headet, K70 keyboard, Glaive mouse, and MM800 mousepad.