Raspberry Pi 4 (8GB) Tested: Double the RAM, New 64-Bit OS | Tom's Hardware
RPI4-MODBP-4GB - Raspberry-pi - Single Board Computer, Raspberry Pi 4 Model B, BCM2711 SoC
Amazon.com: Waveshare Accessory Compatible with Raspberry Pi 4 Model B 4GB RAM with Powerful Processor Faster Networking Support Dual 4K Output and Different Choice of RAM Comes with a Copper Heat Sink :
Raspberry Pi 4 VIA Model B 4Gb Ram Linux Micro Controller Board for IOT Electronic Kit - Resho Online Shopping in India
Raspberry Pi 4 Computer Model B 4gb Ram | Raspberry Pi 4 Computer Model B 2gb Ram - Demo Board - Aliexpress
Raspberry Pi 4 Model B - 4GB RAM
$35 Raspberry Pi 4 announced with 4K support and up to 4GB of RAM - The Verge