The characteristics of the Raspberry Pi 3 generation:
Faster processor speed. At 1.2 GHz, Pi 3 is one and a half times faster than Pi 2 and performs better. The Pi 3 has an 802.11 b/g/n wireless LAN and Bluetooth Classic and Low Energy (BLE) onboard. You can connect faster, no longer relying on any external device like the Pi 2 era.
As processors get faster and have more onboard connectivity, you'll need more power. The power supply for the previous Pi board will not be sufficient, and a 2.5 A power supply is recommended.
The Pi 3 has a chip antenna located in front of the status LED. The status LED is still on the board, just beside the MicroSD card slot.
• Broadcom BCM2837 chipset, operating at 1.2 GHz
• 64-bit quad-core ARM Cortex-A53
• 802.11 b/g/n wireless LAN
• Bluetooth 4.1 (classic and low power)
• Dual-core Videocore IV® multimedia coprocessor
• 1 GB LPDDR2 memory
• Support for all new ARM GNU/Linux distributions and Windows 10 IoT
• MicroUSB connector for 2.5 A power supply
• 1 x 10/100 Ethernet port
• 1 x HDMI video/audio connector
• 1 x RCA video/audio connector
• 4 USB 2.0 ports
• 40 GPIO pins
• Chip antenna
• DSI display connector
• microSD card slot
