LRDIMM (Load Reduced Dual-inline Memory Module) is designed with a buffer chip to replace the register to help minimize loading, it can increase overall server system memory capacity and speed. It is pin-compatible with existing DDR3 DIMM sockets and LRDIMM is JEDEC standard. 

   Advantages of LRDIMMs

By reducing the load on the server memory bus, LRDIMMs can support higher data frequencies and significantly increase memory capacity. This is accomplished by utilizing an isolation memory buffer (iMB™) chip in place of a register to reduce the bus load when transferring data between the memory and processor.

LRDIMM modules deliver up to twice the installed memory capacity for next-generation servers as a result of their ability to reduce the loads presented to the CPU. Servers with the higher-installed memory densities can then run the memory at a higher frequency, enabling up to a 35 percent increase in memory bandwidth over standard RDIMMs, improving overall data center performance and efficiency. 

   Applications of LRDIMMs

The capacity and speed benefits of LRDIMM technology are most useful in memory intensive applications for data centers, cloud computing and high-performance computing. HPC examples include weather forecasting, oil and gas exploration, and particle modeling, where larger data sets can be loaded into memory and therefore processed more quickly. Virtualization, an important component of many hosting and cloud computing offerings, is enhanced by the ability to run more virtualized environments within a single OS instance. Data center managers can run more workloads using the same amount of electric power, thus improving productivity and TCO (Total Cost of Ownership).