RDRAM®
Designed using Rambus Signaling Levels (RSL), RDRAM devices provide designers with operating speeds significantly faster than currently available DRAM devices.
RDRAM devices provide systems with 16MB to 2GB of memory capacity at speeds of up to 1066MHz. The RDRAM channel achieves its a high-speed through several innovative techniques that include separate control and address buses, highly efficient protocol, low voltage signaling and precise clocking to minimize skew between clock and data lines
RDRAM provides best, most balanced solution for Pentium®4 systems
- The front side bus and memory sub system are matched at 3.2GB/s for optimized performance.
- Memory bandwidth is becoming more important as the Pentium 4 increases in speed.
RDRAM memory is the best choice for PCs and Workstations
- balance : 3.2GB/s 2-Channel RDRAM memory matches today's Pentium4 processor front side bus
- performance : Twice the effective bandwidth of competing technologies in half the pins
- value : System performance unencumbered by memory allows RDRAM systems with slower CPUs to outper-form faster systems on competing memory technologies
- granularity & simplicity : Single device upgrades, cost-effective board and module solutions
| memory yype | SDRAM : 64b bus RDRAM : 1channel |
SDRAM : 128b bus RDRAM : 2channel |
||
|---|---|---|---|---|
| 256Mb gen | 512Mb gen | 256Mb gen | 512Mb gen | |
| SDRAM ×8 | 256MB | 512MB | 512MB | 1GB |
| SDRAM ×16 | 126MB | 256MB | 256MB | 512MB |
| RDRAM | 32MB | 64MB | 64MB | 128MB |
The explosive demands from the Internet and high-performance consumer products are driving the need for more bandwidth. RDRAM has helped to close the bandwidth gap with the best price/performance system solution for today and future system design requirements.
RDRAM is designed into today most advanced computer, consumer and communications products. Many of these products are Best-of-Class in their marketplace and the number of products is constantly growing.
computer products, desktop PCs, PC workstations and serversSystem memory bandwidth is more important than ever before. The increase in processor performance, multimedia and 3D graphics, high bandwidth memory is essential to sustain system performance. RDRAM memory provides the bandwidth necessary to extract the full potential of the Intel Pentium™ 4 processor.
Today's workstations and servers require great performance, high bandwidth and reliability. Professional users choose systems with RDRAM memory for exceptional performance, bandwidth headroom and platform longevity.
consumer productsConsumer products demand the highest levels of performance to give life-like animation to game consoles, and high-quality digital imaging in digital HDTVs, and high-speed encoding/decoding in set-top boxes.
communications productsWith the proliferation of the Internet and the demand for faster, more reliable systems, leading manufacturers have turned to RDRAM-based system solutions. RaSer?SerDes Cell technology offers communications companies a standard cell that easily integrates into their product. Using RDRAM memory helps customers to differentiate their systems from the competition while gaining the performance they needed.
| high bandwidth per pin |
Production worthy of 1066MHz short channel PC : FSB frequency evolution every 3 years N/W : Bandwidth evolution every 2 years |
|---|---|
| multiple transaction | Internal 4 transaction simutaneously |
| number of bank | Performance Gain due to High Row Hit Ratio |
| small pin count |
Chipset pin increment Trend of integration Package Size reduction of memory & controller |
| high bus efficiency |
Precise scalability of clock cycle(DLL inside) Write buffer inside RDRAM |
| low EMI affect |
RSL Interface Small amount of bus line |




