This is a kind of processor.
Part Number: BCM2837
Function: Quad Core Cortex A53 Processor @ 1.2 GHz(4x ~2760 DMIPS)
Dimensions : 85 x 56 mm Type
Manufacturer: Broadcom ( http://www.broadcom.com/)
Image
Description
Full HD 1080p HP H.264 Video Encode/Decode DualCore VideoCoreIV Multimedia Co-Processor
( Arch. ARMv8 Cortex A53, Clock speed : 1.2 GHz )
Spec
Features
1. New BCM2837 chip
2. Quad-core 64-bit ARM cortex A53 CPU
3. Clocked at 1.2GHz
4. ~50% faster than Pi 2
5 .400MHz VideoCore IV GPU
6. 1GB LPDDR2-900 SDRAM
7. New BCM43438 chip for WiFi/BT
8. 802.11n Wireless LAN
9. Bluetooth 4.1
Reference Site
1. https://en.wikipedia.org/wiki/Raspberry_Pi
2. https://wikidevi.com/wiki/Broadcom
3. https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=137991&p=916362
4. http://raspi.tv/2016/raspberry-pi-3-model-b-launches-today-64-bit-quad-a53-1-2-ghz-bcm2837