How to overclock Raspberry Pi 4

Overclock Raspberry Pi 4 using Raspberry Pi OS.

Operating system.

milosz@raspberrypi:~ $ lsb_release -a

No LSB modules are available.
Distributor ID:	Debian
Description:	Debian GNU/Linux 11 (bullseye)
Release:	11
Codename:	bullseye

Kernel/architecture details.

milosz@raspberrypi:~ $ uname -a

Linux raspberrypi 5.15.76-v8+ #1597 SMP PREEMPT Fri Nov 4 12:16:41 GMT 2022 aarch64 GNU/Linux

Maximum stable values for desktop usage.

milosz@raspberrypi:~ $ cat /boot/config.txt

[...]

# cpu, gpu settings
over_voltage=6
arm_freq=2140
gpu_freq=750
gpu_mem=256

[...]

Temperature reading with a single small fan.

milosz@raspberrypi:~ $ vcgencmd measure_temp

temp=37.0'C