A Bitcoin mining rig is a computer system used for mining the cryptocurrency Bitcoin. The rig is composed of multiple components, including processors, graphics cards, cooling fans, and other hardware. The rig can either be used to mine Bitcoin on its own or join a mining pool where many miners combine their computing power to increase their chances of earning Bitcoin rewards. The rig requires an internet connection, as well as a software program to control the mining process. Additionally, the rig will require a certain amount of electricity to power the hardware, as well as a storage device to store the mined Bitcoin.