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XDR DRAM - Wikipedia, the free encyclopedia XDR DRAM is a high performance RAM Interface like SDR-SDRAM and DDR-SDRAM. The XDR solution was engineered to be effective in small high-bandwidth consumer systems, high-performance main memory applications, and flagship GPUs. XDR is the official choice by Sony for the PlayStation 3 console. en.wikipedia.org /wiki/XDR_DRAM   (172 words)

Elpida Memory's 512 Megabit XDR DRAM Provides Industry-Leading Data Transfer Rate for Digital Consumer Electronics The XDR DRAM architecture offers the highest performance, next-generation memory available for applications such as digital televisions and home servers that require high bandwidth to support high-end graphics, superb digital imaging and advanced multimedia. XDR DRAM is based on the XDR memory interface technology developed by Rambus Inc. (Nasdaq: RMBS). Elpida's 512 Megabit XDR DRAM (Part number: EDX5116ABSE) devices are organized as 4M words x 16-bits x 8 banks and with 2.4, 3.2, 4.0 GHz operation, they offer more than 4 times the peak bandwidth of the latest DDR2 standard memory adopted in PC applications. www.elpida.com /en/news/2005/03-30.html   (599 words)

Real World Technologies - CELL Microprocessor Revisited Rambus's XDR memory system is an interesting memory system in that it heavily leverages the Flexphase de-skewing mechanism to ensure correctness of operation. However, in order to operate with more DRAM devices in a given channel of XDR memory systems, the Flexphase circuitry in the controller interface of the XDR memory system must be able to filter out the additional skew. Figure 2 shows that in the XDR memory system, command and address information is delivered to the DRAM devices across the 12 bit wide command and address bus that operates at the data rate of 800 Mbps. www.realworldtech.com /page.cfm?ArticleID=RWT022805234129&p=2   (792 words)

New DRAM technology boosts throughput eightfold: News from Toshiba Electronics Europe XDR DRAM is expected to initially serve the high-bandwidth needs of consumer, graphics, and networking applications, with eventual applicability for PC main memory, server and mobile systems when these applications require higher levels of bandwidth. XDR DRAM will be available in multiple speed bins, device densities, and device widths. XDR memory's novel matrix topology allows point-to-point differential data interconnects to scale to multigigahertz speeds, while the bused address and command signals allow a scalable range of memory system capacity supporting from one to 36 DRAM devices. www.electronicstalk.com /news/tos/tos187.html   (528 words)

Rambus - XDR Rambus XDR™ DRAM technology is a total memory system solution that achieves an order of magnitude higher performance than today's standard memories while utilizing the fewest ICs. The XDR DRAM device is a high-speed memory IC that turbocharges standard CMOS DRAM cores with a high-speed interface capable of 3.2 and 4.0 GHz data rates with a roadmap to 4.8, 6.4, and 8.0 GHz in the future. The XMC (XDR memory controller) is a fully synthesizable logical memory controller that is optimized to take advantage of the technology's many special features like Dynamic Point-to-Point. www.rambus.com /products/xdr   (206 words)

Elpida, Toshiba claim world's fastest XDR DRAMs The 512-megabit XDR DRAM devices from the companies each operate at 3.2-GHz, providing what they claim is an industry-leading data transfer rate of 6.4-gigabytes-per-second. XDR DRAM is geared for high-end applications, such as digital televisions and home servers. XDR, which stands for extreme data rate, will be initially targeted for consumer electronics and graphics applications. www.simmtester.com /PAGE/news/shownews.asp?where=2895625&num=7931   (410 words)

new (?) Rambus XDR memory and PlayStation 3 information - Beyond3D Forum In addition, as for the number of XDR DRAM tips/chips which are loaded onto PlayStation 3 by the information from the DRAM industry authorized personnel, it was found that they are 4 or more. That SCE desires the multiple source with XDR DRAM it is seen that other than the thing where the memory airlift increased, the difference of the position of RDRAM and XDR DRAM has influenced. Because of that, when XDR DRAM of 3.2Gtps is used, it becomes the memory zone of 3.2Gtps×64bit= approximately 25.6GB/sec. www.beyond3d.com /forum/showthread.php?t=11886   (4315 words)

X-bit labs - Hardware news - Rambus Does Not Give Up: Prepares XDR DRAM Launch in 2006. XDR memory’s novel system topology allows point-to-point differential data interconnects to scale to multi-gigahertz speeds, while the bussed address and command signals allow a scalable range of memory system capacity supporting from 1 to 36 DRAM devices. XDR DRAMs will be available in multiple speed bins, device densities, and device widths. In 2006, when Rambus wants to introduce its XDR DRAM, the industry will start to ramp up the DDR-III memory at 800MHz that will pump up to 12.8GB/s in dual-channel mode that seems to be enough for microprocessors of that time. www.xbitlabs.com /news/memory/display/20031015160738.html   (536 words)

Real World Technologies - ISSCC 2005: The CELL Microprocessor In the XDR memory system, address and command are sent on the address and command bus at a rate of 800 Mbits per second (Mbps), and the point to point interface operates at a datarate of 3.2 Gbps. However, in the configuration illustrated in figure 9, the maximum of 4 DRAM devices means that the CELL processor is limited to 256 MB of memory, given that the highest capacity XDR DRAM device is currently 512 Mbits. Fortunately, XDR DRAM devices could in theory be reconfigured in such a way so that upwards of 36 XDR devices can be connected to the same 36 bit wide channel and provide 1 bit wide data bus each to the 36 bit wide point-to-point interconnect. www.realworldtech.com /page.cfm?ArticleID=RWT021005084318&p=11   (855 words)

Rambus - DRAM The Rambus XDR DRAM device is a high-performance memory device capable of 3.2 and 4.0 GHz data rates with a roadmap supporting 4.8, 6.4, and 8.0 GHz in the future. Unlike other DRAM devices, the x16 XDR DRAM device implements programmable width and supports data busses that are 8, 4, and in some cases 2 bits wide. With this and many other architectural enhancements, the XDR DRAM device boasts much higher efficiency and throughput when compared with other memoriy technologies. www.rambus.com /products/xdr/dram.aspx   (151 words)

Rambus, Toshiba and Elpida Announce XDR DRAM, the World's Fastest Memory Initially XDR DRAM will be offered at 3.2GHz with a roadmap to 6.4GHz and beyond, enabling memory system bandwidths up to 100GB/s. XDR memory's novel matrix topology allows point-to-point differential data interconnects to scale to multi-GHz speeds, while the bussed address and command signals allow a scalable range of memory system capacity supporting from one to 36 DRAM devices. Forward-looking statements include statements about the adoption rate of XDR DRAM into and suitability for the consumer, graphics, networking, PC main memory, server and mobile markets, as well as the dates of when XDR DRAMs are expected to ship into their respective markets and ramp into volume production. www.us.design-reuse.com /news/news5880.html   (1011 words)

News about Rambus and the PS3 - Beyond3D Forum The XDR DRAM family has been architected to offer mainstream memory solutions for a broad range of applications. XDR DRAM offers significant cost savings by providing the same system bandwidth as alternatives with fewer DRAM components, low-cost 4-layer PCBs, and inexpensive industry-standard packages. Additional information on XDR DRAM and the memory interface can be found at www.rambus.com/xdr. www.beyond3d.com /forum/showthread.php?t=5614   (2700 words)

Rambus, Toshiba, Elpida announce XDR DRAM The three letter XDR doesn't appear to stand for anything, although it's probably a contraction of extreme and DRAM. XDR will be used in future Playstation "cell" technologies. Future versions of XDR DRAM will speed up to 6.4GHz and above, and the memory will be available in densities between 256MB to 8GB. www.theinquirer.net /?article=10423   (180 words)

X-bit labs - Hardware news - Samsung Starts Mass Production of XDR DRAM. Samsung’s current XDR DRAM devices operate at 2.0GHz clock-speed, significantly reduced frequency compared to Rambus’ advertised 3.20GHz operating frequency. Another target market for XDR memory may be graphics cards, according to reports in 2004. XDR DRAM can operate at 3.20GHz to 6.40GHz clock-speeds, providing industry leading bandwidth per pin, which is a benefit for networking and consumer applications. www.xbitlabs.com /news/memory/display/20050126030743.html   (399 words)

Rambus Eyes PC Market Again With "XDR DRAM" The DRAM designer hopes to add another chapter in its ongoing melodrama, which began as a story of a niche DRAM house that made it as a main memory powerhouse and Wall Street darling, followed by a disastrous legal rampage that alienated several of its former customers and licensees. XDR DRAM, like RDRAM, was created to solve the I/O problem that has continually plagued system designers: the fastest microprocessor is useless without an I/O and memory subsystem that can keep up. XDR DRAM will be designed for multiple configurations to allow DRAM suppliers to differ their products. www.extremetech.com /article2/0,1558,1188770,00.asp   (1217 words)

PS3 = 512Mbit XDR-DRAM (and Nintendo to adopt XDR-DRAM?) - Beyond3D Forum A 256-bit bus based on XDR would use 16 XDR modules, each providing 6.4Gb/s for a total of 102gb/s bandwidth, which is twice the PS2 GS. A 128-bit bus NV5x using XDR would have 256-512mb of memory and yield 51gb/s of bandwidth, which is pretty freaking impressive. XDR is a reduction, and 128-bit XDR would have superior bandwidth to all known graphic GPUs and eDRAM in production (e.g. www.beyond3d.com /forum/showthread.php?t=17323   (3188 words)

DriverHeaven.net - Rambus renames Yellowstone as XDR DRAM Rambus has pledged to take XDR to at least 6.4GHz for a 100GBps memory bandwidth, and while it hasn't offered up a timetable for that ramp, it's undoubtedly going to try and keep ahead of DDR/DDR II for as long as it can. Indeed, even Rambus admits that "XDR DRAM is expected to initially serve the high-bandwidth needs of consumer, graphics and networking applications, with eventual applicability for PC main memory, server and mobile systems when these applications require higher levels of bandwidth". And to highlight the roles Rambus sees XDR being targeted at initially, it reiterated Sony's plan to use XDR in "future broadband applications" based on its Cell processor. www.driverheaven.net /showthread.php?t=20088   (432 words)

[No title] In a nutshell, DRAM microthreading allows XDR2 DRAM to trade a small increase in control logic size/complexity and a larger increase in command bus traffic for the ability to make more efficient use of the data bus. In this respect, microthreading aims to counteract the current trend of DRAMs to rely ever more heavily on locality of reference to bridge the growing gap between data bus bandwidth, which is steadily improving, and DRAM access latencies, which are not. The rate at which DRAMs operate and are able to respond to individual read requests isn't increasing nearly as fast as the memory bus's ability to move data and the processor's ability to consume it. arstechnica.com /news.ars/post/20050707-5067.html   (1949 words)

Elpida Memory's 512 Megabit XDR DRAM provides industry-leading data transfer rate for digital consumer electronics. - ...   (Site not responding. Last check: 2007-10-11) Elpida Memory's 512 Megabit XDR DRAM provides industry-leading data transfer rate for digital consumer electronics. XDR DRAM is based on the XDR memory interface technology developed by Rambus Inc. Our 512 Megabit XDR DRAM is an ideal solution to provide maximum performance with a minimum number of devices allowing customers to save valuable board space." highbeam.com /doc/1G1:131855141/Elpida+Memorys+512+Megabit+XDR+DRAM+...   (504 words)

VR-Zone : Technology Beats - Toshiba Samples 512Mb XDR DRAM The 512Mb XDR DRAM chips run at a speed of 4.8GHz, which is about 12 times faster than that of the memory typically found in today's desktop PCs. XDR is the name of a memory technology developed by Rambus and incorporate a Rambus technology called ODR signalling, which can transfer eight bits of data per clock cycle. The 512Mb XDR chips will not be needed for mainstream desktop computers, but the chips' ability to process large volumes of data quickly means they will be useful in very high-end workstations, network systems, and for graphics and video applications. www.vr-zone.com /?i=1941&s=1   (258 words)

SAMSUNG's Digital World - Semiconductor | XDR™ / RDRAM XDR DRAM(eXtreme Data Rate DRAM) is based on XDR memory interface technology developed by Rambus and offers several innovative techniques that include ODR(Octal Data Rate), DRSL(Differential Rambus Signaling Level) and etc. XDR DRAM has three speed grades, ranging from 2.4GHz to 4.0GHz, with the expectation that data transfer speeds will rise to 8.0GHz in the near future. XDR DRAM is best memory solution for wide-ranging applications including video console games, digital televisions, computer servers, workstations and other applications where high bandwidth and low latency are required. www.samsung.com /Products/Semiconductor/XDR_RDRAM   (300 words)

ITworld.com - Toshiba begins shipping XDR DRAM sample chips XDR, which was formerly known by its Yellowstone development code name, is targeted at high-performance applications such as digital consumer electronics, network systems, game consoles and graphics applications. Toshiba's first samples are 512M-bit DRAM (dynamic RAM) chips and come slightly ahead of schedule. When Rambus announced XDR in July this year it said it expected sample chips to begin rolling off fabrication lines at Toshiba during 2004. www.itworld.com /Comp/1938/031229toshibadram/pfindex.html   (171 words)

Rambus Marks Finish Line For XDR DRAM - Short-Media Forums The XDR DRAM technology (formerly code-named Yellowstone) will transfer data at 3.2GHz initially, rising to 6.4GHz in the future--much faster than memory available now. In effect, that means XDR DRAM, which will be manufactured by partners Toshiba and Elpida, should ultimately be capable of transferring 100GB of data per second. While XDR DRAM will likely face stiff resistance for acceptance in the PC market, it could find a home in consumer electronics and the communications industry, where memory based on Rambus' designs is used. www.short-media.com /forum/showthread.php?t=1373   (331 words)

Samsung to Produce World's Fastest XDR DRAM Short for Extreme Data Rate, the XDR DRAM architecture is based on a limited number of very high-speed signals used for address, data, and control information. The Samsung 256Mb XDR has an Octal Data Rate process that transfers data at eight bits per clock cycle, while cranking up the transfer speed to an industry-leading eight gigabytes per second. Samsung plans to introduce a 512Mb XDR DRAM, capable of transferring data as fast as 12.8 gigabytes per second, during the first half of this year. www.physorg.com /news2838.html   (581 words)

EEProductCenter.com :: First 90-nm, 512-Mbit xDR DRAM sampling for multimedia applications   (Site not responding. Last check: 2007-10-11) The company's latest memory device employs xDR DRAM, Rambus' memory architecture that is expected to be the next-generation memory for applications that require high bandwidth to support high-end graphics, digital imaging and advanced multimedia. The xDR DRAM architecture also provides the part with data-transfer technology called FlexPhase, which improves the reliability of design layout, Deen said. The 512Mb XDR DRAM will have an introductory price of between $25 and $30, according to a Samsung spokesperson. www.eeproductcenter.com /memory/brief/showArticle.jhtml?articleID=163105717   (528 words)

Rambus unveils XDR DRAM with Elpida, Toshiba - Computerworld The new technology, to be known as XDR DRAM for extreme data rate dynamic RAM, will run at 3.2 GHz when samples start shipping in 2004, Rambus said. Rambus is using a completely different interface technology for XDR DRAM than used by double data rate (DDR) synchronous DRAM (SDRAM) vendors today, said Dean McCarron, principal analyst at Mercury Research in Scottsdale, Ariz. "This is a high-performance memory for high-performance applications," he said. Sony is expected to use XDR DRAM in the upcoming PlayStation 3, because it already uses RDRAM in the popular PlayStation 2 console. www.computerworld.com /printthis/2003/0,4814,83149,00.html   (351 words)

Rambus - XDR2 XDR2 DRAM devices are targeting 8.0GHz data rates, enabling a single DRAM device with 16GB/s of peak bandwidth. The result is a traditional 8-bank CMOS DRAM core with the performance of a 16-bank memory device. An XDR2 DRAM device, however, accesses only small portions of data per column access, allowing finer access granularity and increased effective bandwidth. www.rambus.com /products/xdr/xdr2.aspx   (236 words)

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