For our testing, we used Aqua Computer’s triple slot radiator with three 12cm Airstream fans combined with Eheim HPPS 12V water pump. We’re talking about fans that run at constant 1200RPM, but are inaudible. In fact, our results showed that they’re a great match with large radiators.

Motherboard: EVGA X79 FTW
CPU: Sandy Bridge-E Core i7 3820  (3.6GHz)
CPU Cooler: Thermalright HR-02 (Thermalright-Europa Distri www.PC-Cooling.de).
Memory: 8GB ADATA DDR3 1600 XPG Gaming series
Harddisk:   OCZ Vertex 2 100 GB
Power Supply: CoolerMaster Silent Pro 1000W
Case: CoolerMaster Cosmos II Ultra Tower
Operating System: Win7 64-bit
Nvidia 305.37-desktop-win7-winvista-64bit-english-beta
AMD 12-6_vista_win7_64_dd_ccc.exe

(EVGA GTX 690 4GB & Gainward GTX 670 Phantom SLI : 301.34-desktop-win7-winvista-64bit-english-whql)