Characteristics and Interoperability GAMMAXX 400 PRO IS AN UPGRADATION OF THE CLASSIC GAMMAXX 400 DESIGN. Without compromising compatibility with RAM and cases, the GAMMAXX 400 PRO dramatically improves cooling performance with two additional LED fans and more densely packed cooling fins. GAMMAXX 400 PRO Extra Heat-Resisting Fins bluish LED fans Superior Heat Pipe Performance Primary Contact Base Dark Top Cover Extra Fins for Dissipation GAMMAXX 400 PRO, a 120mm cooler, has 56 cooling fins in total. Its twin fan design maximizes airflow by increasing the total surface area by 20% when compared to single fan models. bluish LED fans Two 120mm PWM fans are included with the GAMMAXX 400 PRO as standard equipment, which significantly improves both performance and looks. Superior Heat Pipe Performance GAMMAXX 400 PRO