Raspberry Pi 4 Model B, released in 2019, unveiled a model with 8GB RAM, which has been rumored for a long time. Raspberry Pi 4 Model B is a single board computer that supports USB 3.0 and Type C with SoC BCM2711 based on ARM Cortex-A72, a 1.5GHz quad-core 64-bit CPU.
The maximum capacity supported by the BCM2711 is 16GB, but since there was no compatible 8GB LPDDR4 package at the time of release in 2019, only 3 types of RAM were available: 1, 2, and 4GB. However, in the official Raspberry Pi beginner’s guide, the 8GB RAM-equipped model is depicted as if it has already been released, raising expectations for the release of the 8GB RAM-equipped model. In the user guide, the relevant expressions (Raspberry Pi 4 Model B 1GB, 2GB, 4GB + 8GB variants) were put in, and it seemed as if a model with 8GB RAM had already been released.
And in fact, on May 28th, the Raspberry Pi 4 Model B with 8GB of RAM has finally become a reality. The price is $75, and at the same time, the price of the model with 2GB RAM has been cut from $45 to $35.
This product is the same as the existing Raspberry Pi 4 Model B except that it has 8GB of RAM. However, as the required power has increased, the position of the board has changed slightly, such as installing a switch mode power supply located next to the USB 2.0 socket next to the USB Type C power connector.
The existing standard operating system, Raspbian, was made with a 32-bit OS and can be used on a Raspberry Pi with 8GB of RAM. However, due to the 32-bit version limitation, a single process can only write up to 3GB of memory. Therefore, in order to use 8GB of memory, you must use a 64-bit version such as Ubuntu or Gentoo Linux.
Therefore, Raspbian was renamed Raspberry Pi OS, and not only 32-bit but also 64-bit versions were released. The initial beta version of the 64-bit Raspber APOS can be downloaded from here . Related information can be found here .