What parameter helps determine the compatibility of RAM with a motherboard?

The parameter that most directly influences the compatibility of RAM with a motherboard is the RAM type, such as DIMM or SO-DIMM. This is because motherboards are designed to accept specific types of RAM based on their form factor and connection interface. DIMMs (Dual Inline Memory Modules) are generally used in desktop computers, whereas SO-DIMMs (Small Outline DIMMs) are used in laptops and compact devices. If the RAM does not match the required type for the motherboard, it simply cannot be installed regardless of its capacity or speed.

While RAM size and speed are important for performance, they do not determine whether the RAM can physically fit into the motherboard's slots. RAM color does not influence compatibility at all; it is primarily a cosmetic feature and has no impact on the functionality or fit of the RAM with the motherboard. Thus, identifying the correct type of RAM is essential to ensure that it is compatible and will work correctly with the motherboard's architecture.