A PC motherboard, often referred to as the mainboard or system board, is a crucial component of a computer that serves as the backbone for connecting all other parts. It houses the CPU (Central Processing Unit), RAM (Random Access Memory), and various expansion slots for graphics cards, sound cards, and other peripherals. Additionally, the motherboard features integrated circuits for power management and connects to storage devices through SATA or NVMe interfaces. Different motherboard form factors, such as ATX, MicroATX, and Mini-ITX, determine their size and compatibility with computer cases. Motherboards also offer ports for USB devices, audio jacks, and network connectivity, making them essential for communication between hardware components and facilitating a smooth computing experience. Understanding motherboard specifications, such as chipset, voltage regulation, and supported RAM types, is important for building or upgrading a PC to ensure optimal performance and compatibility.