Testing was done with the following test setup
CPU: Intel Core i5 2500K 3,3GHz
Motherboard: Asus P8P64 PRO Rev 3.1
RAM: Patriot 4GB DDR3
HDD: Patriot TorqX 2 128GB SSD
Videocard: Asus 9800GT
Testing was done with the following software:
Ambient temperature during testing was 22 celsius (~75F). For load temperatures we ran the 32M SuperPi benchmark while idle temperatures were taken while idling in Windows without anything else running in the background. Fans were at ~1000rpm during testing.
Stock Temperature 3,3GHz:
At stock speed all these coolers perform excellent, the Zalman has the highest temperature while the Noctua and the Coolermaster has the lowest load temperatures.
Boosting vCore with 0,5V and boosting the Multiplier gives us a increase to 3,7GHz, we also increased fan speed with 500rpm for this to compensate for the overclocking. We can see that the Hyper 412 performs very well and at full load the cooler performs as well as the Noctua. Full load temperatures were taken after 30 minutes in this test but we ran the rig for another hour and we saw that the Noctua stayed at 35 while the Hyper 412 went up up to 37 degrees and the CNPS11X went up to 38C.