The Pi 400 already runs at a factory 1.8 GHz, which is significantly faster than the 1.5 GHz of the 4B. We can take it a step further, however, and clock speeds of 2 GHz without any throttling. This is primarily thanks to the Pi 400's massive internal heatsink, which works quite well.
Get started by adding one of these to your /boot/config.txt
file.
Running Ubuntu on your Pi? Try
/system-boot/config.txt
instead.
arm_freq=1900
over_voltage=4
arm_freq=2000
over_voltage=5
arm_freq=2100
over_voltage=6
arm_freq=2200
over_voltage=8
force_turbo=1
Warning: the
force_turbo
bit will void your warranty!
Since the 4B runs at 1.5 GHz, it's wise to start around 1.8 GHz, instead of 2+ GHz right out the door. Active cooling is mandatory for overclocking the 4B. You will experience throttling almost immediately without adequate cooling.
arm_freq=1800
over_voltage=4