What is DDR 184-pin Socket?
The DDR 184-pin Socket is a standard interface designed specifically for first-generation DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memory, commonly referred to as DDR1) desktop memory modules. In the early 2000s, it replaced the older 168-pin SDRAM and became the mainstream standard for Pentium 4 and AMD Athlon XP systems.
Core Physical Specifications
- Pin Count: 184 pins in total, with 92 pins on each side.
- Keying Design: Features a single notch located off-center to prevent incorrect insertion into 168-pin SDRAM or 240-pin DDR2 sockets.
- Module Length: Standard length is approximately 5.375 inches (about 13.65 cm).
- Pitch: Pin spacing is typically 1.27 mm.
Electrical and Technical Characteristics
- Operating Voltage: Standard voltage is 2.5V; some high-performance or overclocked modules may reach 2.6V. This is lower than SDRAM’s 3.3V, reducing power consumption.
- Transmission Technology: Supports Double Data Rate (DDR), transferring data on both rising and falling edges of the clock signal, doubling bandwidth compared to SDR.
- Data Path: Provides a 64-bit data bus.
Common Supported Specifications
| Specification | Clock Frequency | Transfer Rate (MT/s) | Theoretical Bandwidth |
|---|---|---|---|
| PC1600 | 100 MHz | 200 MT/s | 1.6 GB/s |
| PC2100 | 133 MHz | 266 MT/s | 2.1 GB/s |
| PC2700 | 166 MHz | 333 MT/s | 2.7 GB/s |
| PC3200 | 200 MHz | 400 MT/s | 3.2 GB/s |
Differences from Other Generations
184-pin is only applicable to DDR1 and is physically incompatible with subsequent generations.
- SDRAM: 168-pin, with two notches.
- DDR2 / DDR3: Both use 240-pin sockets, but with different notch positions.
- DDR4: 288-pin, with curved gold fingers.
Where to Buy DDR Socket
DDR is considered a legacy product. Taiwanese manufacturers such as Chun Chi Industrial Co., Ltd. and Anytronic Corporation Limited began producing DDR sockets in 2003. Their products—made from LCP and NY66 materials—are available in a wide range of specifications and are widely used in computers and other electronic devices.
Introduction to DDR Socket Specifications and Components
