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XDR DRAM transfers data at 9.6GBps

Posted: 12 Oct 2007 ?? ?Print Version ?Bookmark and Share

Keywords:fastest DRAM? consumer electronics? DDR2?


Elpida Memory Inc. and Rambus Inc. claim the industry's fastest DRAM, the 512Mbit, 4.8GHz XDR DRAM, based on Rambus' XDR memory architecture. This latest addition to the XDR DRAM family provides an industry-leading data transfer rate of 9.6GBps with a single device, making it an ideal choice for high-performance, high-volume applications such as HDTVs, gaming consoles, PCs, servers and workstations.

"The industry's demand for memory bandwidth in next-generation products is growing rapidly as high-definition image data becomes more popular," said Yoshitaka Kinoshita, officer for the digital consumer division of Elpida Memory. "Working with Rambus on XDR DRAM, we can provide the most cost-effective, high-bandwidth memory solution to our customers."

The XDR DRAM, part number EDX5116ADSE-5E-E, is organized in 8-banks (x16/x8/x4 programmable). With a 9.6GBps data transfer rate, it delivers six times the peak bandwidth of industry-standard DDR2-800 memory devices, claimed Elpida Memory. The 4.8GHz XDR device is manufactured using Elpida's 70nm process technology and is available in a 104-ball FBGA package.

To support both high-speed and robust data transfer, XDR DRAM utilizes key technologies built on patented Rambus innovations. These include Differential Rambus Signaling Level (DRSL), which minimizes signal swing and noise, Octal Data Rate (ODR) technology which transfers 8bits of data on each clock cycle to achieve 4.8GHz operation with just a 600MHz clock and FlexPhase circuit technology for precise on-chip data alignment with the clock. The 512Mbit XDR DRAM device also features adaptive impedance matching, dynamic request scheduling and zero overhead refresh.

"Elpida's 4.8GHz XDR DRAM is an excellent fit for consumer electronics applications requiring high bandwidth for 3-D graphics, high-definition image processing, and advanced multimedia," said Sharon Holt, senior VP of worldwide sales, licensing and marketing at Rambus. "Elpida is well established as a leading XDR DRAM supplier and we are proud to work with them to advance the roadmap for XDR to 4.8GHz, achieving the world's fastest DRAM."

XDR DRAM is an integral part of the XDR memory architecture, working seamlessly with the XDR Memory Controller (XMC), XDR IO controller interface cell (XIO) and the XDR Clock Generator (XCG) to enable unprecedented levels of memory performance while utilizing the fewest number of ICs. A single XDR DRAM device operating in x16 mode achieves a data transfer rate of 9.6GBps. In comparison, it requires six DDR2-800 x16 devices to achieve an equivalent data rate.

The EDX5116ADSE-5E-E will be available for sampling in December. Volume production will begin in April 2008.

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