The Raspberry Pi 4 Model B is the latest board from Raspberry Pi .
Although the Pi 4 looks similar to the previous model, there are some very significant upgrades.

One of the key components in the Raspberry Pi 4 is the Broadcom BCM2711 SoC. It consists of four 1.5GHz 64-bit ARM Cortex-A72 CPU cores and should offer a nice performance boost over the Cortex-A53 CPU in the Raspberry Pi 3 (it's up to three times faster).

It is now also possible for the first time to choose the amount of RAM.
Options include: 1GB, 2GB or even 4GB of RAM.
For reference, the Raspberry Pi 3 only came with 1GB of RAM, which is a bit on the low side for normal use.

The Pi 4 now comes with 2 Micro HDMI ports, each of which can be used to connect a 4K monitor.

Please note! The Raspberry Pi 4 gets very hot, we definitely recommend using Heatsinks.

Physical characteristics:

• 40-pin GPIO
• 2x USB 3.0
• 2x USB 2.0
• MicroSD Slot
• 2 x Micro HDMI connector for 4K video
• 4-pole jack connector for stereo output and composite video
• USB C power connector
• CSI port
• DSI port

Features:

• Processor: Broadcom 2711, Cortex-A-72, 64-bit SoC @ 1.5 GHz
• Memory: 1GB LPDDR4 SDRAM
• Bluetooth connection: 5, BLE
• 2.4 GHz and 5 GHz IEEE 802.11.b/g/n/ac wireless LAN
• Gigabit Ethernet over USB 3.0 True Gigabit Ethernet
• Multimedia: H.265,MPEG-4 decode (4kp60, 1080p60) H.264, MPEG-4 decode (1080p30); H.264 encode (1080p30); OpenGL ES 1.1, 2.0, 3.0 graphics
• Operating temperature: 0°C - 50°C
• 5V/3A DC via USB-C (Minimum 2A)
• 5V DC via GPIO header
• Power over Ethernet (PoE) - With this method you need a separate HAT, this is still being introduced by the Raspberry Pi foundation