No wonder the wire getting warm.
I just find out that corsair VS550 only had one 6 pin from PSU. You need at least 2 separate connection from PSU.
Sorry dude, i didn't check the 6 pin availability. From power aspect, VS550 can work. But you need at least 2 6pin from psu, not 2 6pin on one wire.
It's like this right? This count as one, not two