Raspberry Pi 4 is the latest product in the popular Raspberry Pi range of computers, and this is the version with the highest RAM offered by a Raspberry Pi ever (8GB). It offers ground-breaking increases in processor speed, multimedia performance, memory, and connectivity compared to the prior-generation Raspberry Pi 3 Model B+.
https://www.seeedstudio.com/Raspberry-Pi-4-Computer-Model-B-8GB-p-4595.html