Raspberry Pi 3

CPU : Broadcom BCM2387 chipset.

1.2GHz Quad-Core ARM Cortex-A53 (64Bit)
802.11 b/g/n Wireless LAN and Bluetooth 4.1 (Bluetooth Classic and LE)

GPU : Dual Core VideoCore IV® Multimedia Co-Processor. Provides Open GL ES 2.0, hardware-accelerated OpenVG, and 1080p30 H.264 high-profile decode.
Capable of 1Gpixel/s, 1.5Gtexel/s or 24GFLOPs with texture filtering and DMA infrastructure

Memory : 1GB LPDDR2

Operating System : Boots from Micro SD card, running a version of the Linux operating system or Windows 10 IoT

Dimensions : 85 x 56 x 17mm

Power : Micro USB socket 5V1, 2.5A

Connectors 

Ethernet
10/100 BaseT Ethernet socket
Video Output
HDMI (rev 1.3 & 1.4)
Composite RCA (PAL and NTSC)
Audio Output : Audio Output 3.5mm jack 
HDMI
USB 4 x USB 2.0 Connector
GPIO Connector
40-pin 2.54 mm (100 mil) expansion header: 2x20 strip
Providing 27 GPIO pins as well as +3.3 V, +5 V and GND supply lines
Camera Connector
15-pin MIPI Camera Serial Interface (CSI-2)
Display Connector
Display Serial Interface (DSI) 15 way flat flex cable connector with two data lanes and a clock lane
Memory Card Slot
Push/pull Micro SDIO