The Raspberry Pi 3 is the third generation Raspberry Pi. It replaced the Raspberry Pi 2 Model B in February 2016. Compared to the Raspberry Pi 2 it has:

    A 1.2GHz 64-bit quad-core ARMv8 CPU

    802.11n Wireless LAN

    Bluetooth 4.1

    Bluetooth Low Energy (BLE)

Like the Pi 2, it also has:

    1GB RAM

    4 USB ports

    40 GPIO pins

    Full HDMI port

    Ethernet port

    Combined 3.5mm audio jack and composite video

    Camera interface (CSI)

    Display interface (DSI)

    Micro SD card slot (now push-pull rather than push-push)

    VideoCore IV 3D graphics core

The Raspberry Pi 3 has an identical form factor to the previous Pi 2 (and Pi 1 Model B+) and has complete compatibility with Raspberry Pi 1 and 2.