For cases capable of housing ATX or larger motherboards, we use our standard ATX case test kit, which includes:
We disable the motherboard's onboard CPU fan control and all CPU power
management features. The CPU fan is fixed at 7V with an adaptor while
the graphics card fan is locked at 70 percent speed using MSI
Afterburner. The system is loaded using Prime95 25.11 and Unigine's
Heaven 4.0 benchmark. We use Core Temp and GPU-Z to monitor the
temperatures, taking the maximum values after 15 minutes - enough time
for the readings to plateau. To account for inconsistencies in the ambient temperature at the time of testing, we report the delta T values for both components i.e. the measured temperature minus the recorded room temperature during testing.