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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DDRDand capacity variants, modules can be one of the following:. It is also misleading because various memory timings are given in units of clock cycles, which are half the speed of data transfers.

This reduction jeddec from the difference in supply voltages: In other projects Wikimedia Commons.

This advantage is an enabling technology in DDR3’s transfer speed. The Core i7 supports only DDR3.

Retrieved 12 December By using this site, you agree to the Terms of Use and Privacy Policy. Retrieved 19 March CL — CAS Latency clock cyclesbetween sending drd3 column address to the memory and the beginning of the data in response. This is 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. All articles with unsourced statements Articles with unsourced statements from March Archived from the original PDF on Views Read Edit View history.


As with earlier memory generations, faster DDR3 memory became available after the release of the initial versions. DDR3 modules are often incorrectly labeled with the prefix PC instead of PC3 speccification, for marketing reasons, speecification by the data-rate.

For the graphics memory, see GDDR3.

Retrieved from ” https: Under this convention PC is listed as PC High-performance graphics was jeddec initial driver of such bandwidth requirements, where high bandwidth data transfer between framebuffers is required.

DDR3 prototypes were announced in early DDR3 memory utilises serial presence detect. Bandwidth is calculated by taking transfers per second and multiplying by eight.

Archived from the original on The CPU’s integrated memory controller can then work with either. Devices that require DDR3L, which operate at 1.

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

This page was last edited on 17 Novemberat In addition to bandwidth designations e. Not only are they keyed differently, but DDR2 has rounded notches on the side and the DDR3 modules have square notches on the side. Archived from the original on April 13, There is some improvement because DDR3 generally uses more recent manufacturing processes, but this is not directly caused by the change to DDR3. The actual DRAM arrays that store the data are similar to earlier types, with similar performance.

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This article is about the computer main memory. Of these non-standard specifications, the highest reported speed reached was equivalent to DDR, as of May For the video game, see Dance Dance Revolution 3rdMix. Archived from the original on December 19, 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.

From Wikipedia, the free encyclopedia.

DDR3 SDRAM – Wikipedia

Memory standards on the way”. Some manufacturers also round to a certain precision or round up instead. The DDR3L standard is 1. Another benefit is its prefetch bufferwhich is 8-burst-deep.