There’s the Raspi itself, a 2.5″ hard drive, a USB hub, GPIO expansion, and wireless and Bluetooth ... a board that turns your Raspberry Pi into a Mini-ITX computer. The basic idea behind ...

The ASRock Phantom Gaming B850I Lightning Wi-Fi does a decent job of bringing AMD’s overclocking-enabled B850 chipset to the Mini-ITX form factor, but the price is a little high for what it offers.

The Seaberry is one such design, as demonstrated by [Jeff Geerling], giving the CM4 a Mini ITX formfactor and a ton ... loaded up with 7 more TPUs, 5 more WiFi cards, and 3 more NVME drives.