config.txt

# Use kernel8 on Raspberry Pi running buster os
# kernel=kernel8.img

## poe_fan_temp
##    temp0 is lower speed fan, temp1 is high fan speed.
##    Current setting is fan turns on at 70C, turns off when it comes back down to 65C.
##    If the temperature reaches 75C it will go full blast until it drops back down to 70C. 
# dtparam=poe_fan_temp0=70000,poe_fan_temp0_hyst=5000
# dtparam=poe_fan_temp1=75000,poe_fan_temp1_hyst=5000

# This setting will change the behaviour so that the fan turns on at 80C, turns off when it comes back down to 75C.
# If the temperature reaches 82C it will go full blast until it drops back down to 80C.
# You can play with the values and adjust them so that they suit you

dtparam=poe_fan_temp0=80000,poe_fan_temp0_hyst=5000
dtparam=poe_fan_temp1=82000,poe_fan_temp1_hyst=2000

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
dtoverlay=vc4-fkms-v3d
max_framebuffers=2