The Raspberry Pi 4 gets a RAM upgrade: The 2GB version is now $35 | Ars Technica
Buy a Raspberry Pi 4 Model B – Raspberry Pi
Raspberry Pi 4 now offers 8GB of RAM and that's a really big deal | Trusted Reviews
Raspberry Pi 400 Gets an 8GB Upgrade — By Hand-Balling and Soldering a Donor RAM Chip - Hackster.io
Raspberry Pi 4 Model B 2GB
8GB of RAM on Raspberry Pi 4 & 64bit support - NotEnoughTech
Can I Upgrade the RAM of Raspberry Pi
Raspberry Pi 4 Model B 8GB RAM
Which Raspberry Pi 4 RAM option do I have? – The Pi Hut
Wholesale Raspberry Pi Compute Module 3+ 8GB/16GB/32GB eMMC Flash 1GB RAM supports Windows 10 From m.alibaba.com
Amazon.com: Vemico Raspberry Pi 4 Model B 4GB Set RAM 4GB Base Starter Kit with SD Card, Heatsinks, HDMI Cable, Power Supply, Black Case, Reading Card Device, Screwdriver : Electronics