For our temperature tests we loaded the system for 10 minutes using Prime 95 and recorded the CPU temperature using CPUID HWMonitor. We then restarted the system and left it idling at the desktop for 10 minutes before measuring temperatures. The temperatures recorded are based on an ambient temperature of 20 degrees C.
Here we can see the thermal performance of the Shadow Rock 2 isn't amazing compared to the Noctua models, however it is designed with acoustics in mind.
The Be Quiet! DC1 thermal paste offered pretty good performance, coming close to the Arctic Cooling MX-2 used in the standard test.