What is the function of the notch in the memory module?

The function of the notch in a memory module is to ensure proper installation of the module. The notch serves as a physical guide that aligns the memory module with the slot on the motherboard, preventing it from being inserted incorrectly. This design feature is crucial because inserting a memory module the wrong way can potentially damage both the module and the motherboard. The notch helps users identify the correct orientation for installation, promoting ease of use and reducing the chance of errors during the installation process.

The other options, while they may sound plausible, do not accurately represent the primary purpose of the notch. Grounding, heat dissipation, and power connection are important aspects of memory module functionality, but they are handled through other design features and engineering practices, not specifically through the notch itself.