For our temperature tests we loaded the system for 10 minutes using Furmark and recorded the GPU temperature using CPUID HWMonitor. We then restarted the system and left it idling at the desktop for 10 minutes before recording idle temperatures. The temperatures recorded are based on an ambient temperature of 20 degrees C.
Here we can see that the Kraken G10 and X40 combination offers excellent cooling performance, especially compared to the reference design. Although the Sapphire model runs hotter, we have to consider that it is a factory overclocked model which will account for some of the temperature increases.