Prolimatech Megahalems Rev. C CPU Cooler Review

Measuring temperatures is all about being consistent; therefore we make sure that the test is kept completely fair so that none of the coolers are at a disadvantage. We measure the CPU temperature using HWMonitor after a 15 minute idle period. We then measure the CPU temperature using HWMonitor after a 15 minute load period using Prime95 with the small FFTs setting.

The chart shows the delta CPU temperature (difference between ambient temperature and recorded CPU temperature). This way we can fairly compare each cooler without presenting any inaccuracies due to slight fluctuations in the ambient temperature or unfair results.

Here is an example of how to understand delta temperatures. “If the ambient (room) temperature is 25C and the recorded CPU temperature is 65C, the delta temperature is the CPU’s temperature rise above ambient temperature, therefore the delta temperature in this case would be 40C. If the ambient temperature is 23C and the recorded CPU Temperature is 80C, the delta temperature in this case would be 57C. Delta temperature = Recorded CPU temperature – Ambient temperature”

The Megahalem’s Rev. C shows promising performance at stock CPU frequency. It manages to outperform the Alpenföhn K2 and matches the performance of Noctua’s NH-D14.  Each of the options from Phanteks, Be Quiet! and Thermalright outperform the Megahalems Rev. C at this frequency. Beating the performance of Thermaltake’s Frio Advanced by 2°C puts Prolimatech into first place when it comes to single tower CPU coolers, at stock frequency at least.