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.
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
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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