Raspberry Pi Compute released (PCIe slot) up to 8GB of RAM and eMMC - Server - openHAB Community
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OpenWrt Wiki] Raspberry Pi
Raspberry Pi 400 Gets an 8GB Upgrade — By Hand-Balling and Soldering a Donor RAM Chip - Hackster.io
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Raspberry Pi 400 Gets an 8GB Upgrade — By Hand-Balling and Soldering a Donor RAM Chip - Hackster.io
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I built a Raspberry Pi 400 with 8GB of RAM. : r/raspberry_pi
Raspberry Pi upgrades Compute Module with 10 times the CPU performance | Ars Technica