Raspberry Pi Dramble Cluster Upgrade - 3 B+ to 4 - YouTube
Amazon.com: Waveshare Accessory Compatible with Raspberry Pi 4 Model B 2GB RAM with Powerful Processor Faster Networking Support Dual 4K Output and Different Choice of RAM Comes with a Copper Heat Sink :
The Raspberry Pi 4 gets a RAM upgrade: The 2GB version is now $35 | Ars Technica
I made the Raspberry Pi 4 with 3GB of RAM. : r/raspberry_pi
The Raspberry Pi 4 gets a RAM upgrade: The 2GB version is now $35 | Ars Technica
Raspberry Pi 4 hits stores with faster CPU, 4K video, and RAM options | VentureBeat
Raspberry Pi 4 gains 8GB RAM version and 64-bit Raspberry Pi OS
Raspberry Pi 4 gains 8GB RAM version and 64-bit Raspberry Pi OS
Raspberry Pi 4 (8GB) Tested: Double the RAM, New 64-Bit OS | Tom's Hardware