I would ask if this fan is compatible with the carrier board or help me find a better cooler for cm4? Thanks
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I have not tested this, but it is +12V and specifically for a CM4 module: https://smile.amazon.com/Dedicated-Cooling-Raspberry-Adjustable-Convenient/dp/B0B3F63DGD/ref=sr_1_3
I'll go ahead and order one for testing here.