The Raspberry Pi 3 is most awaited update for a better performance. It features a 64-bit quad-core processor running at 1.4 GHz, a 2.4 GHz wireless LAN and Bluetooth 4.1 / BLE.
Specification of Pi 3 B/A+/B+:
Audio and display: HDMI port(1080p video out)
Broadcom Soc: Broadcom BCM2837(for 3B)
Broadcom BCM2837B0(for 3 A+/B+)
Processor: ARM Cortex A-53 x 4(for 3B)
ARM Cortex A-53 x 4(for 3 A+/B+)
Processor speeds: 1.2GHz(for 3B)
1.4GHz(for 3 A+/B+)
GPU: Broadcom VideoCore IV @ 250 MHz
Broadcom VideoCore IV @ 400 MHz/300 MHz(for 3B+)
Ram: 1GB(for 3B/B+)
512MB(for 3A+)
Input: Usb 2.0 x 1(for 3A+)
Usb 2.0 x 4(for 3B/B+)
Power: Micro usb type B(5v,2.5A),GPIO
Usb otg port: None
Ethernet: None(for 3A+)
10/100 Mbit/s(for 3B)
10/100/1000 Mbit/s but real speed is 300 Mbit/s(for 3B+)
Wifi: b/g/n/ac dual band 2.4/5 GHz(for 3A+/B+)
b/g/n single band 2.4 GHz
Bluetooth: 4.2 BLE(for 3A+)
4.1 BLE(for 3B)
4.2 LS BLE(for 3B+)
Video input: CSI camera port
Usb port: 1(for 3A+)
4(for 3B/B+)
Audio in: Revision boards through I²S
Audio out: 3.5mm audio jack port,HDMI,I²S
Video out: HDMI,DSI display port,audio jack as RCA jack,GPIO
GPIO port: 40 GPIO headers(compatible with hats)
Reset: Software reset
Power consumption: Idle (3A+/B/B+)[240/230/400]
Video 1080p (3A+/B/B+) [280/290/510mA]