Short for
dual in-line memory module, a small
circuit board that holds
memory chips. A
single in-line memory module (SIMM) has a
32-bit path to the memory chips whereas a DIMM has 64-bit path. Because the
Pentium processor requires a 64-bit path to memory, you need to install SIMMs two at a time. With DIMMs, you can install memory one DIMM at a time.