Here, we’re looking at DeepCool’s second-generation AK series coolers, the AK400 G2 and AK620 G2. (Image credit: Tom's Hardware)▶️ High-performance 120 mm fans(Image credit: Tom's Hardware)There’s more to a cooler than just the heatsink. The fans included on both AK400 and AK620 G2 models are essentially the same – but the AK400’s single fan runs up to 10% faster than the two fans included with the AK620 G2. Swipe to scroll horizontally Fan Speed AK400 G2: 2200 RPM (± 10%)AK620 G2: 2000 RPM (± 10%) Airflow AK400 G2: 63.4 CFMAK620 G2: 57.76 CFM Air Pressure AK400 G2: 3.33 mmAqAK620 G2: 2.78 mmAq▶️ Woodgrain and digital display styles availableBoth the AK400 and AK620 are available in black or white, but there are two sub-choices for the aesthetic. (Image credit: Tom's Hardware)If you don’t like woodgrain, DeepCool also includes a checkerboard black cover that you can use in place of the woodgrain covers.