Which component is necessary for connecting a CPU to the motherboard?

The component necessary for connecting a CPU to the motherboard is the CPU socket. This specialized connector is designed to fit the CPU securely and facilitate communication between the CPU and the motherboard. The CPU socket has pins or holes that correspond to the CPU's contacts, ensuring that the processor is properly seated and aligned.

This connection is essential because the CPU is the main processing unit of the computer, and it must interact with the motherboard to execute instructions and manage data. It also plays a crucial role in providing the necessary power and signals to the CPU for its functioning.

The other components listed, while important for a computer system, do not serve the purpose of connecting the CPU to the motherboard. The power supply provides electrical power to the system, RAM serves as memory for temporary data storage during operation, and the graphics card is responsible for rendering images and video output. None of these components directly accommodate the physical and electrical interface needed for the CPU to be installed and operational on the motherboard.