Memory Glossary

Common Terms

RDIMM (Registered DIMM)

A memory module with a register between the DRAM chips and the memory controller, providing better signal integrity for server applications.

SODIMM (Small Outline DIMM)

A smaller form factor memory module used in laptops, compact PCs, and embedded systems.

UDIMM (Unbuffered DIMM)

A standard desktop memory module without buffering, offering lower latency at the cost of reduced capacity per channel.

LRDIMM (Load-Reduced DIMM)

A memory module using data buffers to reduce electrical loading, enabling higher capacity configurations in servers.

ECC (Error-Correcting Code)

Memory technology that detects and corrects single-bit errors, essential for server and mission-critical applications.

CAS Latency (CL)

The delay between a memory read command and the data being available, measured in clock cycles.

MT/s (Megatransfers per second)

The data transfer rate of memory, indicating how many million transfers occur per second.