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My Antec PSU is only semi-modular. It has PCIE cables I will not be using. Rather than let the cables go to waste tucked away while my Molex cables do all the work, I decided to make an adapter. I started with a PCIE extension cable:
I needed a Molex plug to power my PWM splitter, and two 3-pin male sockets to power my top intake fans. Providentially, the PCIE plug provides three pairs of 12v/ground. So I ordered the extension, got it, cut it up, spliced it, soldered it, sleeved it and voila:
Tested it. It works! It all stays behind the MB, and there is one less unused cable I have to tuck away.

I needed a Molex plug to power my PWM splitter, and two 3-pin male sockets to power my top intake fans. Providentially, the PCIE plug provides three pairs of 12v/ground. So I ordered the extension, got it, cut it up, spliced it, soldered it, sleeved it and voila:

Tested it. It works! It all stays behind the MB, and there is one less unused cable I have to tuck away.