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风扇转速≥2500RPM时散热提升明显但噪音普遍超过45dB，办公/图书馆场景建议选可调速且带静音档(≤35dB/1500RPM以下)的型号

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Unverified风扇转速越高散热越好但噪音越大：单风扇大直径低转速（<1500RPM）噪音约30dB接近静音，多风扇高转速可达45dB以上，办公/图书馆环境建议选可调速或大直径低转速方案90% similar Unverified风力越大噪音越高，全速档普遍超过75dB接近吸尘器水平，室内或夜间使用建议选带分档调速、低档≤60dB的型号87% similar Unverified风扇转速高降温强但噪音大，1500转以下噪音约40dB以下适合办公，2000转以上可达45-50dB接近人声干扰；优先选带无级调速或分区风扇开关的型号，可在安静与强力间切换87% similar Unverified转速越高散热能力越强但噪音同步上升：机箱风扇1200rpm约20dBA近似静音，2000rpm约35dBA可听感明显，3000rpm以上通常超40dBA形成明显干扰。追求静音选支持PWM调速且额定≤1500rpm的型号87% similar Unverified主动风扇散热效果与噪音正相关，转速2500rpm以上风扇降温明显但噪音超40dB，办公/视频会议场景建议选带无级调速或PWM温控的型号，可在35dB以下运行85% similar

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