There's a simple check to see which Raspberry Pi 4 Model B version is sitting on the desk in front of you. The Raspberry Pi 4 is currently available in 2GB, 4GB and 8GB variants.
If you look closely at the RAM chip (don't worry, there will be pictures below!) you will see one of three codes printed on it. Simply match up the code to the data below and you're away!
- 1GB - SEC928
- 2GB - D9WHZ or SEC940
- 4GB - D9WHV
- 8GB - D9ZCL
Raspberry Pi 4 Model B (1GB): [No longer sold]