# registered memory

> computer memory module containing a hardware buffer between the DRAM chips and the system's memory controller

**Wikidata**: [Q449328](https://www.wikidata.org/wiki/Q449328)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Registered_memory)  
**Source**: https://4ort.xyz/entity/registered-memory

## Summary
Registered memory is a computer memory module containing a hardware buffer between the DRAM chips and the system's memory controller. This technology enables greater memory capacity and stability in servers and workstations.

## Key Facts
- Registered memory contains a hardware buffer between DRAM chips and the system's memory controller
- It is a subclass of memory module (discrete printed circuit board on which memory chips are mounted)
- Also known as buffered memory, RDIMM, registered DIMM, mémoire vive à tampons, Registermodul, and other aliases in multiple languages
- Used primarily in server computers, workstations, and for scalability as primary memory
- Contains hardware registers as a component part
- Opposite of unbuffered memory
- Different from ECC memory though partially coincident with it
- Has 11 sitelinks and Wikipedia articles in 10 languages (ca, commons, de, en, fr, hu, it, ko, ru, uk)
- Microsoft Academic ID (discontinued): 93446704

## FAQs
### Q: What is the difference between registered memory and unbuffered memory?
A: Registered memory contains a hardware buffer between the DRAM chips and the system's memory controller, while unbuffered memory does not have this buffer. This difference makes registered memory more suitable for systems requiring greater memory capacity and stability.

### Q: Is registered memory the same as ECC memory?
A: No, registered memory and ECC memory are different though they can be found together in the same memory module. Registered memory refers to the presence of a hardware buffer, while ECC (Error-Correcting Code) memory is designed to detect and correct data corruption.

### Q: What are the main uses of registered memory?
A: Registered memory is primarily used in server computers and workstations where stability and scalability are critical. It enables systems to support larger amounts of memory without compromising performance or reliability.

## Why It Matters
Registered memory plays a crucial role in modern computing infrastructure, particularly in enterprise environments. By incorporating a hardware buffer between memory chips and the memory controller, it enables systems to support significantly more memory modules than would otherwise be possible. This is essential for servers and workstations that require substantial RAM for virtualization, large databases, and other memory-intensive applications. The buffer helps maintain signal integrity and reduces electrical load, allowing for greater memory density and system stability. As computing demands continue to grow, the importance of registered memory in enabling scalable, reliable systems increases.

## Notable For
- Essential for high-capacity server and workstation systems requiring scalability as primary memory
- Contains hardware registers that buffer signals between DRAM chips and memory controllers
- Known by multiple international names including RDIMM, mémoire vive à tampons, and Registermodul
- The subject of Wikipedia articles in 10 different languages
- Associated with the discontinued Microsoft Academic ID 93446704

## Body
### Technical Definition
Registered memory is a computer memory module that contains a hardware buffer between the DRAM chips and the system's memory controller. This buffer, implemented through hardware registers, helps maintain signal integrity and reduces electrical load on the memory controller.

### Common Names and Classifications
- Also known as: buffered memory, RDIMM, registered DIMM, mémoire vive à tampons, Registermodul, Registered Module, Registered RAM, Registered, 无缓冲内存, Буферизованной памяти
- Classified as a type of memory module (discrete printed circuit board on which memory chips are mounted)
- Opposite of: unbuffered memory
- Different from: ECC memory (though partially coincident)
- Contains hardware registers as a component part

### Usage Applications
- Primary use: server computers and workstations
- Secondary use: systems requiring scalability as primary memory
- Example implementation: Micron MTC40F204681RC48BA1R DDR5 SDRAM with ECC and RDIMM (64 GiB)

### Documentation and References
- Wikipedia title: "Registered memory"
- Available in Wikipedia articles in 10 languages: ca, commons, de, en, fr, hu, it, ko, ru, uk
- Commons category: RDIMM
- Freebase ID: /m/06_qxf (referenced from Q15241312 on 2013-10-28)
- Microsoft Academic ID (discontinued): 93446704
- Sitelink count: 11
- Images available: 
  - Physical example: https://commons.wikimedia.org/wiki/Special:FilePath/Micron_PC2700_DDR_ECC_REG.JPG
  - Technical schematic: https://commons.wikimedia.org/wiki/Special:FilePath/20210402_Registered_versus_load-reduced_DIMM_memory.svg

## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)