Which two types of RAM modules are commonly used in desktop computers?

The correct answer highlights two commonly used types of RAM modules in desktop computers: DIMM and SO-DIMM.

DIMM, or Dual Inline Memory Module, is the standard RAM type for most desktop systems. It features a wide memory interface and typically supports larger capacities, making it ideal for handling multiple tasks and applications that are common in desktop environments. DIMMs have a 64-bit data bus, which allows them to efficiently process data and improve system performance.

SO-DIMM, or Small Outline DIMM, is commonly used in laptops and compact devices due to its smaller size. While not used directly in standard desktop computers, understanding its application is critical within the context of memory technology. SO-DIMMs also possess a similar architecture to DIMMs, enabling them to support various speeds and memory types.

The other options either describe older RAM technologies or focus on specific types of memory without the clear identification of module formats for desktops. Thus, the distinction of DIMM and SO-DIMM as standard modules reflects their relevance in contemporary computing environments.