Conclusion: The product page mentioned – “120x25mm fan with PWM function offers a perfect balance between airflow and noise.” which I agree. The heatsink and fan is limited, and in order to get the good temperature, the fan does give some noise to it. It’s not like stock heatsink fan at full RPM, not at all. It’s considered silent. Something you won’t take not of when you’re gaming away. I just believe it’s something worth mentioning.
Summary: The Gammaxx 300 is one of the quietest CPU coolers that we have tested, even at full load, while maintaining a decent cooling performance. The strong point of this cooler, however, is that it is inexpensive.
This cooler may not be the best choice for the extreme overclocking enthusiast, but if you want a quiet CPU cooler that fits a narrow budget, the Gammaxx 300 is a good option. That’s why we are giving it our Silver Award.