Three things to weigh up: size (120 or 140 mm), control and lighting. PWM models change speed with temperature, and ARCTIC's PST marking means the next fan can be chained onto the first and take up only one header on the board. A-RGB versions light up with addressable LED strips, but they need a separate connector. If you are replacing several at once, the factory packs of three or five are more convenient.
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Three things to weigh up: size (120 or 140 mm), control and lighting. PWM models change speed with temperature, and ARCTIC's PST marking means the next fan can be chained onto the first and take up only one header on the board. A-RGB versions light up with addressable LED strips, but they need a separate connector. If you are replacing several at once, the factory packs of three or five are more convenient.