Amazon.com: RasTech Raspberry Pi Compute Module 4 1GB RAM eMMC 0GB (Lite) Single Board (CM4001000) 64-Bit 1.5GHZ Quad-Core Processor Bluetooth 5.0 No Wi-Fi for Networked Ai Core and More : Electronics
Where is the RAM on a Raspberry Pi [Answered] :: The Quantizer
I made the Raspberry Pi 4 with 3GB of RAM. : r/raspberry_pi
The Raspberry Pi Foundation unveils the Raspberry Pi 4 | TechCrunch
ODROID-C2 is faster and has more RAM than Raspberry Pi 3 | Digital Trends
How to Squeeze 50% More Memory Out of Your Raspberry Pi with zram