Overall, I am genuinely satisfied with my new custom liquid cooling I got.

I was able to cut down on the noise by a very respectable amount by moving the temperature polling from the CPU to the coolant temperature, yet the CPU temperatures themselves lowered, especially when it's hit with a 100% load, such as 3D rendering for example.

Lowering the D5 pump however, to around 20-25% duty cycle, creates an interesting humming noise that passes right onto the Corsair 900D. Power consumption has also lowered at those duty cycles as well.

Taking some advice from my brother, I'm going to keep my Corsair 900D for a while longer. That ridiculous radiator capacity can come in handy later on down the road.

I'll get some pictures some time later. But to give you an idea of my loop order, the outgoing fluid passes through the back of the case (I can still close the side panel, despite my worry that I would not), and enters the radiator, enters the CPU block, and back to the pump/reservoir unit. The outlet has a T-fitting, which is plugged with a temperature sensor on one end. I'm using the UEFI BIOS to control the fan curves, and I can get the fans as low as 500-600 RPM at idle, as long as the coolant remains at less than 30º C.