XDR™2 Memory Architecture

The XDR™2 memory architecture is the world's fastest memory system solution capable of providing twice the peak bandwidth per device when compared to a GDDR5-based system. Further, the XDR2 memory architecture delivers this performance at 30% lower power than GDDR5 at equivalent bandwidth.

Designed for scalability, power efficiency and manufacturability, the XDR2 architecture is a complete memory solution ideally suited for high-performance gaming, graphics and multi-core compute applications.

Initial systems can achieve memory bandwidths of over 500GB/s into an SoC. Each XDR DRAM can deliver up to 38.4GB/s of peak bandwidth from a single, 4-byte-wide, 9.6Gbps XDR2 DRAM device, and the XDR2 architecture supports a roadmap to device bandwidths of over 50GB/s.

Capable of data rates of 6.4 to 12.8Gbps, the XDR2 architecture is the latest generation in the award-winning family of XDR products. With backwards compatibility to XDR DRAM, the XDR2 architecture is part of a continuously compatible roadmap, offering a path for both performance upgrades and system cost reductions.

The XDR2 memory architecture is the first to incorporate innovations from Rambus' Terabyte Bandwidth Initiative along with other key Rambus innovations including :

• 16X Data Rate enables high data rates (up to 12.8Gbps) at lower system clock and on-chip bus interface speeds.
• Fully Differential Memory Architecture (FDMA) improves signal integrity, reduces power and enables the highest memory performance available.
• Enhanced FlexPhase™ enables high data rates, simplifies layout and eliminates trace length matching.
• FlexLink™ C/A reduces system costs and controller pin-count while providing scalable capacity and flexible access granularity.
• Micro-threading increases transfer efficiency on micro-threaded workloads while reducing power consumption.