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they all come with the speed controller. you have 3 options with it.
1: have it on full speed all the time.
2: have it in thermo controlled via the temp sensor which you stick on the processor.( which i found dodgy)
3. use the manual variable control.
you also have to power it via the adaptor to take power direct ftom the power supply. NOT the 2 pin fan header on the board.
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