Understanding DIMM Slots: A Complete Guide Dynamic Inline Memory Modules (DIMMs) are essential parts of contemporary computer systems because they act as the main system memory interface. Anyoplayson slotsne wishing to construct, modify, or troubleshoot a computer must have a solid understanding of DIMM slots. These slots are crucial in determining the compatibility & performance of the memory that is installed in a system; they are more than just physical connectors. Every motherboard has a set number of DIMM slots, which can have a big impact on the computer's overall performance.