There are two huge upgrades in the RPi 3.  The first is the upgrade of processor, RPi 3 is using Quad Core Broadcom BCM2837 64-bit ARMv8 processor (RPi 2 is using 32-bit processor), making the processor speed increase from 900 MHz on the Pi 2 to up to 1.2GHz on the Pi 3.

 

The second huge upgrade (and this is the one we’re personally most excited about) is the addition of a BCM43143 WiFi chip BUILT-IN to Raspberry Pi 3.  No more WiFi dongle taking up the USB port! Yes, RPi 3 is WiFi ready.  There’s also Bluetooth Low Energy (BLE) on board making the Pi an excellent IoT solution (BLE support is still in the works, software-wise)

Lastly, there’s an upgraded switched power source that goes up to 2.5 Amps instead of just 2 Amps - allowing your Pi to power even more powerful devices over USB ports.

 

Note: Our 5V 2.1 A power adapter still works great with the Pi 3.  

 

The best part about all this is that the Pi 3 keeps the same shape, connectors, and mounting holes as the Pi 2.  The only difference is a slight change in where the LEDs are.  99% of cases and accessories will still be fully compatible with the Pi 3, Pi 2, and Pi B + - though if you have a case with a metal top there might be some WiFi chip difficulties. Of course, you can still use RPi casing with fan.

 

With the increase of proccesor core and speed, the CPU require higher power and will get warmer compare to RPi 2. Cytron Rpi casing with fan is perfect to cool it down :)

 

• Broadcom BCM2837 64bit ARM Cortex-A53 Quad Core Processor SoC running @ 1.2GHz
• 1 GB RAM
• 4 x USB2.0 Ports with up to 1.2A output
• Expanded 40-pin GPIO Header
• Video/Audio Out via 4-pole 3.5mm connector, HDMI, CSI camera, or Raw LCD (DSI)
• Storage: microSD
• 10/100 Ethernet (RJ45)
• BCM43143 WiFi on board
• Bluetooth Low Energy (BLE) on board
• Low-Level Peripherals:
  • 27 x GPIO
  • UART
  • I2C bus
  • SPI bus with two chip selects
  • +3.3V
  • +5V
  • Ground
• Power Requirements: 5V @ 2.4 A via microUSB power source
• Supports Raspbian, Windows 10 IoT Core, OpenELEC, OSMC, Pidora, Arch Linux, RISC OS and More!

• Super Single Board Computer, Rpi 2 vs Rpi 3
• Official Getting Started Guide
• Raspberry Pi Foundation
• Raspberry Pi 3 Datasheet
• Official Raspberry Pi Magazine (online)