thejinx.sheehan
One pointer, you want to turn the rear radiator the other way around so the tubes are coming out of the bottom. I've mounted an AIO cooler not quite the right way before myself and it caused micro bubbles to wind up in the pump and cause a lot of noise. It also makes the pump work harder. If you put the tubes at the bottom, gravity means the pump isn't 'pulling' the water all the way up the radiator and also means any micro bubbles forming will end up at the top of the radiator and wont be in danger of getting circulated down the tube and ending up in the pump.
Here's a recent GamersNexus video where he talks about this and shows the best way to do it:
:EDIT: well it wont let me post a youtube link, the video title is "Ask GN 23: RX 490 Talk, GPU Power %, Driver Performance" and the relevant part is about 8 minutes 40 secs.