HiFive Unmatched 40mm Fan Heatsink Mount
thingiverse
HiFive Unmatched shipped with a loud 25mm fan. This print is a mount to allow attaching 40mm fan directly to the heatsink on the HiFive Unmatched board. **Swapping 25mm fan with 40mm fan in HiFive Unmatched also require a chassis fan to maintain sufficient airflow!** Although, U74 has a 85°C temperature limit and the heatsink should not reach that temperature, but **for safety, please print with PETG or ABS** (and printing with support is required). The print should be tight fit without requiring any screws for both heatsink and fan mount:  Mount in action: 
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