Originally Posted by marc0053
I got the Noctua NF f12 because I was looking for a quiet rig with high as possible static pressure. I believe they run max at around 1500 rpm.
Overclocked 3930K have been measured at around 300 watts.
Overclocked Titans have been measured at around 270 watts each.
That means you have about 800 watts of heat you need to dissipate.
Given Martin's tests, a 120.3 UT60 is able to dissipate about 210 watts with push-only fans at 1400 rpm if you want to maintain a 10C air/water delta (325 watts at 2200 rpm). That leaves you at about 1/2 the cooling you need to maintain a 10C air/water delta. This leaves you with a few options.
1) Lower your overclock (and vCore) to not only reduce the heat going into the loop, but to allow a higher air/water delta without running into thermal limits.
2) Replace your fans with higher rpm fans. The AP-29 with PWM wire allows for 0 to 3000 rpm, so it can scale if needed. If you want to keep them as quiet as possible, you'd have to utilize a water temp sensor and a PWM fan controller capable of automatic adjustment depending on temp (such as the Aquaero).
3) Add more radiator. Since you seem to not have any room left on the inside, it would make sense to have a larger external radiator.
As for your idle temps: I think your mount is pretty decent. It could probably be improved a little with some time and testing, but not by much.