This is the Broadcom chip used in the Raspberry Pi 3, and in later models of the Raspberry Pi 2. The underlying architecture of the BCM2837 is identical to the BCM2836. The only significant difference is the replacement of the ARMv7 quad core cluster with a quad-core ARM Cortex A53 (ARMv8) cluster.
The ARM cores run at 1.2GHz, making the device about 50% faster than the Raspberry Pi 2. The VideocoreIV runs at 400Mhz.