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Amazon.com: SinLoon 4 Knob Cooling Fan Speed Controller PC 8 Channels Fan Hub for CPU Case HDD VGA PWM Fan PCI Bracket 12V Fan Control- 4Pin Interface Power Supply ( 4 Pin 4Knob ) : Electronics
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10pcs Fan Speed Reduce 4 Pin Power Resistor Cable Adapter For Computer Pc Case - Fans & Cooling - AliExpress
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