Aspeed: Ast2500 Datasheet

As a BMC, the AST2500 is the "management brain" of the motherboard. It communicates with sensors on the motherboard to monitor: Temperature Fan speeds Voltage levels Power supply status Chassis intrusion B. Remote Management (iKVM)

1x PCIe Gen2 x1 lane for high-speed host-to-BMC communication. Aspeed Ast2500 Datasheet