As a reference we are using the Zalman CNPS7000-CU which has proven to be a very formidable opponent in the past, delivering solid performance at low noise levels.
The Zalman was tested on High and Low setting with the help of the included Zalman speed regulator. The Everflow fans were tested on the TTIC heatsinks in a multitude of combinations. If 2 fans were used then they were in Suck/Blow configuration, this proved to be the most effective setup.
To further lower the generated noise we hooked the two 3700rpm fans to a Cooler Master Aerogate II unit and cut their rotation speed in half. At this setting we basically had a silent setup.
We noted down maximum load temperatures after running two instances of CPUBurn for ~30 minutes, here are the results:
First up, Suck versus Blow
A massive 4°C difference between the 2 setups, Suck/Blow it is!
The first 2 entrees in the graph pretty much speak for themselves; the NPH-1 and NPH-101 perform identical! I couldn’t find any performance differences between the two heatsinks. Switching to the two lower speed fans results in a temperature increase of only 1°C, while the generated noise is deafening
Using 2 fans the performance of the TTIC heatsinks is spectacular; our trusty Zalman doesn’t even come close. When we start decreasing the amount of fans used as well as their speed the temperature slowly creeps up, and stops at 51° with 1 fan running at its most silent setting, exactly the same as the Zalman @ low speed. While we can still hear the fan of the Zalman spinning, the small 70mm fan running at 7v is completely without noise!Noise Graphs
To give you a better idea of how noisy each heatsink/fan combination was we ranked them according to this table. A bit too subjective for you? Fine, just skip it then. ;-)
|1 ||inaudible in open air|
|2 ||inaudible in case|
|3 ||audible if you pay attention|
|4 ||well audible, far from annoying |
|5 ||well audible, but not annoying|
|6 ||too loud for working (intolerant to noise)|
|7 ||too loud for working (tolerant to noise)|
|8 ||too loud for gaming|
|9 ||too loud for LAN party's|
|10 ||headache within minutes|
Onto the conclusion ->