News Cooler Master's New Dual-Tower Cooler has 135mm and 120mm Fans

So the different fan sizes are ONLY to clear RAM modules? It HAS to hamper performance some, right?

Depends on perspective.

With the perspective of Cooler Master's previous air coolers, no it does not. Previous designs used dual 120mm fans, while this new cooler features a much larger 135mm fan to compensate for any cooling loss its 45mm RAM height clearance might incur.

Technically, based on fan size alone, this cooler is better in every way...
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Oct 12, 2022
IME dual fans only drop the CPU temp ~5-10 F so they could probably use all 120mm fans and achieve the same result but we all know that "Bigger is Better" so you get the best of both fan sizes this way.