Rpi config.txt - Safe overclocking values

To get a little boost out of your RPI while being conservative for applications where you need reliability and avoid data corruption, I found these values to do the job.

This goes in '/boot/config.txt' :

# SD card reader OC (expect 20% rio improvement)
# Samsung Pro/Evo+ is recommended
# default value : 50
# value needs to be an int divisor of core_freq
# NEEDS A UHS-1/Class10 SD CARD !
# dtparam=sd_overclock=100
# To check the sd card clock once booted :  cat /sys/kernel/debug/mmc0/ios | grep 'actual clock'

[pi4]
# Run as fast as firmware / board allows
arm_boost=1
dtoverlay=disable-bt
dtoverlay=vc4-kms-v3d
max_framebuffers=2

# Apply to rpi3, rpi3+, cm3
[pi3]
# Safe OC values
# gpu_freq : Sets core_freq, h264_freq, isp_freq, v3d_freq and hevc_freq together
# default values :
# arm_freq 1200
# gpu_freq 400
# sdram_freq 450
arm_freq=1300
gpu_freq=462
sdram_freq=500
over_voltage=3
# NEEDS A UHS-1/Class10 SD CARD !
dtparam=sd_overclock=66
# Disable bluetooth
dtoverlay=disable-bt
# Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d
max_framebuffers=2


# Override OC values for 3+ models
[pi3+]
# Defaults values : 
# arm_freq 1400
# gpu_freq 400
# sdram_freq 500
arm_freq=1500
sdram_freq=550

[pi1]
# default values
# arm_freq 700
# gpu_freq 250
# sdram_freq 400
arm_freq=1000
gpu_freq=400
sdram_freq=500
over_voltage=6


[all]
# This much is needed for 1080p playback
gpu_mem=64
# Force HDMI Full HD
hdmi_group=1
hdmi_mode=16 # fullHD@60
# Avoid SD card corruption
boot_delay=1
# Disable rainbow splash and power warnings
avoid_warnings=1
disable_splash=1

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