Depending if you're happy with the current temps, you may find the following fan config's better:
* Change the 2 x 25mm (NF-A12x25) on X52 radiator to intake, rather than exhaust
* Put the 2 x 15mm (NF-A12x15) as intake on the bottom under the GPU (may need rubber spacer inserted, as is tight fit)
* Leave the rear NF-A9 as exhaust
That should reduce your GPU temps, as well as get some air flowing over the motherboard components etc. The NCASE is very good at letting all the intake fans push the air out the panels
That's the config I've used on the 3 x AIO NCASE builds I've done & had good success. My current 2 are customer water cooling, but use similar fan configurations on the radiators.
Also with the NZXT CAM, change the fan curves to be based on water temp, rather than CPU temp if that's a possibility (don't remember) - which should stop them ramping up and down
