Updated graphic card and cooling (June 2016) :
The rig is back to a single AIO (H60) in push-pull configuration with 2x F12 IPPC3000, and a 1070 FE in replacement for the 970 Hybrid. This upgrade allows for a much more silent build overall :
CPU custom fan curve : 0°>42° = 10% (340rpm reading?!) after that its 1 to 1 (max=58°/26% cpu fan).
GPU OC custom fan curve : 0°>40° = 40% then almost 1 to 1 (max=66°/70% gpu fan).
GPU max stable OC = +240 GPU / +500 memory. I was able to run steam vr test at +271/+508 but it's nowhere near real life gaming conditions.
Max observed GPU in 2h load = 2176mhz. Average = 2101mhz.
In conclusion : idle is completely silent, load without OC is barely audible (less than the Hybrid in load), load with OC is okay but you can clearly hear the air going through the blower.
Steam vr score 11 (max), 14368.
TimeSpy graphic score : 6514.
Firestrike graphic score : 20 736.
No CPU bottleneck so far, that old i5 is not retiring yet..
Note for 1070/1080 in node 304 with atx psu: there is about 2mm of clearance between the end of the card and the PSU outputs, it's a tight fit.
Last update "Stacked AIOs" (May 2016) :
I wanted to update my gaming node 304 to meet VR requirements (vive on pre-order..) and I got a pretty good deal on an EVGA 970 Hybrid (for Canada). I had to try the stacked AIOs solution in the Node 304 before getting a Cougar QBX, I was not expecting temps that good to be honest.
i5 3570k oc @ 4,4ghz
EVGA 970 Hybrid oc @1540mhz, sadly I hit power throttle if I try to go higher, a lot of room left temp wise. Noise curve is pretty flat, idles a bit louder than I expected but still acceptable, and I can't tell the difference under load. Note : I may use the step-up program if Pascal cards are worth it.
Old Steam vr score was a "capable" (3.7) with a Sapphire 7950. I now get a "vr-ready" (8.2) using 365.10 drivers (little improvement over the 362. drivers).