Noctua NF-A12x25 PWM chromax.black.swap, Premium Quiet Fan, 4-Pin (120mm, Black)

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This is still the best PC case fan you can buy

Noctua presents NH-U12A premium class 120mm CPU cooler - DARKTECH

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What Noctua fan size is best for front of Corsair 4000D case? 120mm bc that's the size of the openings in the front panel. Shown: 3x_P12's PWM 4-pins! 02Feb2022 : r/Noctua