Just looked into this as I’d not heard of it. The systems and platforms supported looks immense. 
I might put this on my Steamdeck.
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So what settings are people using for CM5 overclocking? Just looking for a good starting point.
I thought people are underclocking to manage temps?
This is what I used to test an overclock in the uConsole with the CM5. She does get spicy when overclocked though.
over_voltage_delta=50000
arm_freq=2800
gpu_freq=1000
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I would like to see some Radxa OC 
The Radxas requires you to modify the opp table in the device tree to obtain an overclock.
It’s a lot more involved then overclocking a RPi.
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sudo apt update then sudo apt install sdrpp
Your a star Rex thank you.
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anyone having trouble setting cpu freq in config.txt?
i tried under [pi5] and under [all] the following without any effects:
force_turbo=1
arm_freq=1000
gpu_freq=800
over_voltage_delta=-50000
try something like this to underclock the cm5.
arm_freq=1000
arm_freq_min=500
gpu_freq=800
gpu_freq_min=500
put this into a script and run it before and after to get all your clock speeds.
#!/bin/bash
vcgencmd get_config int | egrep "(arm|core|gpu|sdram)_freq|over_volt"
for src in arm core h264 isp v3d; do echo -e "$src:\t$(vcgencmd measure_clock $src)"; done
for id in core sdram_c sdram_i sdram_p ; do echo -e "$id:\t$(vcgencmd measure_volts $id)"; done
vcgencmd measure_temp
throttled="$(vcgencmd get_throttled)"
echo -e "$throttled"
if [[ $throttled != "throttled=0x0" ]]; then
echo "WARNING: You are being throttled. This is likely because you are undervoltage. Please connect your PI to a better power supply!"
fi
sleep 10
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Those worked.I don’t really understand why but the 1000 is now set.
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Just fired up the Ubuntu image and runs really well I have not ran into any issues yet. Thanks Rex
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Good, I’m glad it’s working well for you!
Rex if i want to change my username in bookwork how can i edit it?
sudo usermod -l new_username old_username
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I tried this but it said user 830 in use something like that.
Yeah, you need to do it from another user. Make a user sudo adduser pi then give it sudo privileges sudo adduser pi sudo logout and log back in as pi then change the username. Then delete the temp user you made. sudo userdel -r pi
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Odd problem: I just fired up the May 11 “ClockworkPi-Bookworm-6.12.27.img.xz” on a CM5 8GB on two different MicroSD cards and still had the same errors with initramfs-tools package post-install script subprocess returned error status 1.
I didn’t catch the rest of the error but it couldn’t determine the properties of / or something similar. Removing the package and reinstalling didn’t (apt install --reinstall initramfs-tools) didn’t fix it of course. Before I dive into deeper scripts, am I on the right image and is this expected or seen by others?
Hmmm… I’ve been using:
Log in as root (default pi account) or use SU
sudo usermod -aG sudo pi (-aG = append group?)
too add a user to the sudo group, obviously “pi” is the username in question, not the actual default pi user. Log out if you were promoting your current account, or log out of root/default and log in as new user with now sudo.