# DDR2 SO-DIMM

> smaller form factor of DDR2 DIMM

**Wikidata**: [Q107449557](https://www.wikidata.org/wiki/Q107449557)  
**Source**: https://4ort.xyz/entity/ddr2-so-dimm

Here’s the structured knowledge entry for **DDR2 SO-DIMM** based on the provided source material:

---

## Summary  
DDR2 SO-DIMM is a smaller form factor variant of DDR2 DIMM memory modules, designed for space-constrained devices like laptops. It belongs to the DDR2 SDRAM class, offering improved performance over its predecessor, DDR SO-DIMM, while maintaining compatibility with SO-DIMM standards.

## Key Facts  
- **Class**: DDR2 SO-DIMM is a subclass of both **DDR2 SDRAM** (second-generation double-data-rate memory) and **SO-DIMM** (small outline DIMM).  
- **Form Factor**: Smaller than standard DDR2 DIMMs, optimized for laptops and compact devices.  
- **Preceded by**: DDR SO-DIMM (first-generation DDR memory in SO-DIMM form).  
- **Succeeded by**: DDR3 SO-DIMM (third-generation DDR memory in SO-DIMM form).  
- **Data Path**: Inherits a 64-bit data path from the DIMM standard.  
- **Image**: Example available at [Samsung 1GB DDR2 SO-DIMM](https://commons.wikimedia.org/wiki/Special:FilePath/Samsung-1GB-DDR2-Laptop-RAM.jpg).  
- **Aliases**: Also known as "DDR2 SODIMM."  
- **Wikidata Description**: Defined as a "smaller form factor of DDR2 DIMM."  

## FAQs  
### Q: What devices use DDR2 SO-DIMM?  
A: DDR2 SO-DIMM is primarily used in laptops and small-form-factor PCs where space is limited, replacing bulkier DDR2 DIMMs.  

### Q: How does DDR2 SO-DIMM differ from DDR SO-DIMM?  
A: DDR2 SO-DIMM offers higher bandwidth and lower power consumption compared to DDR SO-DIMM, as part of the DDR2 SDRAM generation.  

### Q: Is DDR2 SO-DIMM still used today?  
A: While largely superseded by DDR3 and later standards, DDR2 SO-DIMM may still be found in older or legacy systems.  

## Why It Matters  
DDR2 SO-DIMM played a critical role in the evolution of laptop memory by enabling higher performance in compact devices. As part of the DDR2 SDRAM generation, it doubled the data rate of its predecessor while reducing power consumption, making it ideal for portable computing. Its smaller form factor allowed manufacturers to design thinner, lighter laptops without sacrificing memory capacity or speed. Though now outdated, DDR2 SO-DIMM was a stepping stone to modern SO-DIMM standards, influencing the design of subsequent memory modules for mobile devices.

## Notable For  
- **Compact Design**: Enabled memory upgrades in space-constrained devices like laptops.  
- **Performance Leap**: Delivered higher bandwidth and efficiency compared to DDR SO-DIMM.  
- **Compatibility**: Maintained the SO-DIMM standard while advancing DDR2 technology.  

## Body  
### Technical Specifications  
- **Parent Classes**: DDR2 SDRAM (for performance) and SO-DIMM (for form factor).  
- **Data Transfer**: Double-data-rate (DDR) synchronous dynamic RAM.  
- **Pin Configuration**: Follows SO-DIMM standards but with DDR2-specific signaling.  

### Evolution  
- **Predecessor**: DDR SO-DIMM (first-generation DDR in SO-DIMM form).  
- **Successor**: DDR3 SO-DIMM, which further improved speed and power efficiency.  

### Applications  
- Primarily used in laptops, small PCs, and embedded systems during the mid-2000s.  

## Schema Markup  
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "DDR2 SO-DIMM",
  "description": "Smaller form factor of DDR2 DIMM memory modules for laptops and compact devices.",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q62061574"
  ],
  "additionalType": "Technical Standard"
}