This document is the user manual for the ASRock 770 Extreme3 motherboard. It includes specifications for the motherboard such as the CPU, chipset, memory, expansion slots, audio, LAN, rear I/O, connectors, BIOS features, and support software. The manual provides instructions on installing the motherboard components like the CPU, memory, and expansion cards. It also covers BIOS setup and configuring settings like the overclocking features and fan controls.