I´ve seen this post about puuting a Rpi 5 into a pi-top CEED: https://forums.raspberrypi.com/viewtopic.php?t=363187
The power supply on the CEED seems to be not enough for the Pi 5. Would it be possible to disable the CEED power connection and connect the pi to the external power adapter?
Hi, also very interested in this with three units to use at workshops. With a total of 20 CEED units currently with Pi 3. We have a lot of difficulties finding sufficient sockets to plug them all in, and using the pi top ceed with one socket per unit is much easier than finding double the amount - separate sockets for each unit of Pi and a display screen.
Did you ever find out? I am curious about compatibility between the pi5 and the ceed
Hi Andreus, I haven’t actually tried it. It sounds a bit fiddly. I remember that the CEED came out for the Pi 3 in 2016 
There could be some clues here from how to get Pi 4 working with it according to the below:
There is firstly a physical issue with the hdmi lead, but that can easily be sorted, however, other things indicate more to do:
This thread might be of interest regarding pi 4 and CEED
pi 4 and ceed.
But also check out the reply under the photo of Pi4 with CEED because the OS used was not known.
There was a fix for bullseye OS with Pi 4 suggested here:
distorted display fix
And 5 years ago BrutilusK9 said on reddit about using Pi4 with CEED:
Follow-up: I have an early generation Pi-Top CEED. I was a crowd funder.
The display on these units is 1366x768.
On order to get Pi-TopOS working I had to do 2 things:
- In /boot/config.txt, add the following line:hdmi_cvt=1366 768 60 3 0 0 1
- The HDMI needs to be plugged into the connector farthest connector from the power supply connector. Pi-Top OS has that port labeled as HDMI-1 and the near port as HDMI-2
Hope that helps, H
Raspberry Pi 500 may be of interest?
Thanks for the helpful data, H - got my CEED in the mail so going to try this out for myself next.