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Replacement Cooling Fan, 4 Wire 4Pin Interface Connector Cooler Heat Dissipation Fan DC 12V 2.7A 6000RPM Cooling Fan for Antminer S7 S9 : Amazon.co.uk: Computers & Accessories
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Eng] How to Run CPU fan on 12v battery | 3 wire to 2 wire Cooling fan Mod, Pinout, Reverse Polarity - YouTube
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