For idle temperatures the PC is run at idle for three hours and temperature is measured using Realtemp 3.4. For load temperatures Prime95 is run using the "In-place large FFTs" test for three hours then temperature is measured again with Realtemp. Ambient temperature was kept to 24° Celsius (+/- 1°C) and was measured by a standard mercury thermometer.
The system being used to test the heatsink is as follows:
|CPU:||Intel Core i5 650 (2 cores/4 threads)|
|Clock speed:||3.2 GHz "Stock" / 4 GHz "OC"|
|Motherboard:||EVGA P55 FTW|
|Memory:||2x2 GB Mushkin Ridgeback DDR3|
|Video Card:||EVGA GTX260|
|Harddisk:||Western Digital 640 GB Blue|
|Power Supply:||Corsair HX520W|
|Case:||Microcool Banchetto 101|
|Software:||Windows 7 Ultimate x64|
In addition to testing on the test system, the NH-D14 was also tested on a Gigabyte X58A-UD3R with an Intel Xeon X5677 processor to see how well the cooler could perform with high overclocks that enthusiasts may reach. The Intel stock cooler while running the CPU, at a stock frequency of 3.6 GHz, held the CPU at 42°C under load, while the NH-D14 reached a a much lower 34°C. After a weekend of testing, the maximum overclock that was able to be achieved was 4.8 GHz with Hyper-Threading enabled and 1.42V to the CPU core. I was happy to see that the load temperature was no higher than 71°C on all four cores.