This section of the MIG Design Assistant focuses on the Additive Latency, defined by the JEDEC Spec,as it applies to the MIG Virtex-6 DDR3 design. NOTE: This. JEDEC. STANDARD. Double Data Rate (DDR). SDRAM Specification The information included in JEDEC standards and publications represents a sound. Micron Technology, Inc. All rights reserved. Products and specifications discussed herein are subject to change by Micron without notice.

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Under this convention PC is listed as PC Archived from the original PDF on High-performance graphics was an initial driver of such bandwidth requirements, where high bandwidth data transfer between framebuffers is required. Not only are they keyed differently, but DDR2 has rounded notches on the side specitication the DDR3 modules have square notches on the side.

This page was last edited on 17 Novemberat Memory standards on the way”.

DDR3 memory utilises serial presence detect. Because the hertz is a measure of cycles per second, and no signal cycles more often than every other transfer, describing the transfer rate in units of MHz is technically incorrect, although very common.


In addition to bandwidth designations e. Archived from the original on December 19, By using this site, you agree to the Terms of Use and Privacy Policy. For the graphics memory, see GDDR3. Archived from the original on April 13, The Core i7 supports only DDR3.

Retrieved 12 December As with earlier memory generations, faster DDR3 memory became available after the release of the initial versions. This secification because DDR3 memory modules transfer data on a bus that is 64 data bits wide, and since a byte comprises 8 bits, this equates to 8 bytes of data per transfer. Bandwidth is calculated by taking transfers per second and multiplying by eight.

It is also misleading because various memory timings are given in jedce of clock cycles, which are half the speed of data transfers.

DDR3 SDRAM – Wikipedia

Retrieved 19 March Archived from the original on Of these non-standard specifications, the highest reported speed reached was equivalent to DDR, as of May This article spdcification about the computer main memory. Dynamic random-access memory DRAM. From Wikipedia, the free encyclopedia. Another benefit is its prefetch bufferwhich is 8-burst-deep.


Devices that require DDR3L, which operate at 1. Specificatipnand capacity variants, modules can be one of the following:. This reduction comes from the difference in supply voltages: Retrieved from ” https: The CPU’s integrated sepcification controller can then work with either. There is some improvement because DDR3 generally uses more recent manufacturing processes, but this is not directly caused by the change to DDR3. DDR3 modules are often incorrectly labeled with the prefix PC instead of PC3for marketing reasons, followed by the data-rate.

The actual DRAM arrays that store the data are similar to earlier types, with similar performance.

AR# MIG Virtex-6 DDR2/DDR3 JEDEC Specification – Additive Latency

Views Read Edit View history. Some manufacturers also round to a certain precision or round up instead. For the video game, see Dance Dance Revolution 3rdMix.

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