Which of the following is NOT part of a motherboard?

A solid-state drive (SSD) is primarily storage hardware and is typically not integrated into the motherboard itself. Instead, it connects to the motherboard through a specific interface, such as SATA or NVMe, depending on the design of the SSD and the motherboard.

In contrast, RAM is directly installed onto the motherboard in specific slots designed for memory modules, establishing a vital connection for data processing. The graphics card, although it can be a separate component, often plugs into a motherboard slot, facilitating the display output from the computer. The power supply, while not mounted on the motherboard, provides the necessary power to all components connected to the motherboard, including SSDs, RAM, and graphics cards. Thus, the SSD's role as a standalone storage device distinguishes it from the components that are directly a part of the motherboard's architecture.