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XDR to become mainstream memory by 2006

Rambus Inc. announced its roadmap to bring XDR DRAM to the PC main memory market by 2006.

As CPU speeds increase, and as new operating systems and software applications come to market, PC main memory requirements will quickly outgrow the limits of current mainstream memory solutions. Running at 3.2GHz, XDR DRAM offers eight times the bandwidth of today´s best-in-class PC memory. The differential signaling of XDR allows it to scale to 6.4GHz and beyond, providing PCs with unprecedented levels of memory performance.



XDR topology

Rambus has defined all of the ingredients necessary to bring XDR to PC main memory. These ingredients include a broad range of XDIMM memory modules, programmable-width XDR DRAMs, buffers, connectors, clock generators, and comprehensive system design guidelines and documentation.

The XDIMM memory module will provide 12.8GB/s to 25.6GB/s of bandwidth, which is four times more memory module bandwidth in the same pin count and form factor as DDR2 DIMMs, giving the XDIMM the highest performance at the lowest system cost.



Chip block diagram

XDR offers a roadmap to 6.4GHz and can scale to interface widths of up to 128-bits, enabling memory system bandwidths up to 100GB/s, 16 times more than today´s 6.4GB/s memory systems. XDR DRAMs will be available in multiple speed bins, device densities, and device widths. With densities ranging from 256Mb to 8Gb, and device widths ranging from x1 to x32, XDR DRAM satisfies the needs of both high-bandwidth and high-capacity systems.


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