Using 9 cm fan provides more powerful airflow.
The special fin design adequately ventilated the cooler more efficiency. Easy clip installation. Clip patent pending. Product Specifications Fan Size: 90 x 90 x 25 mm Heatsink Material: Aluminum Air Flow: 55 CFM Cooler Dimension: 91 x 100 x 75 mm Support CPU Speed Up To: AMD : Athlon 64 ~ 3800+ (K8); Athlon 64 FX-51 (K8); Athlon 64 FX-53 (K8); Opteron ~ 848 (K8); Sempron ~ 3100+ (K8) chips. Fan Speed: 2600?10% rpm Noise Level: <28 dBA
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