Editing DDR SDRAM (section)

== History ==
[[File:SAMSUNG@DDR-SDRAM@64MBit@K4D62323HA-QC60 Stack-DSC03491-DSC03518 - ZS-DMap.jpg|left|thumb|A Samsung DDR SDRAM 64&nbsp;Mbit chip]]
In the late 1980s [[IBM]] invented DDR SDRAM, they built a [[Double data rate|dual-edge clocking]] RAM and presented their results at the International Solid-State Circuits Convention in 1990.<ref>{{cite book |last1=Jacob |first1=B. |url=https://books.google.com/books?id=SrP3aWed-esC |title=Memory Systems: Cache, DRAM, Disk |last2=Ng |first2=S. W. |last3=Wang |first3=D. T. |publisher=Morgan Kaufmann |year=2008 |isbn=9780080553849 |page=333}}</ref><ref>{{cite journal |last1=Kalter |first1=H. L. |last2=Stapper |first2=C. H. |last3=Barth |first3=J. E. |last4=Dilorenzo |first4=J. |last5=Drake |first5=C. E. |last6=Fifield |first6=J. A. |last7=Kelley |first7=G. A. |last8=Lewis |first8=S. C. |last9=van der Hoeven |first9=W. B. |last10=Jankosky |first10=J. A. |year=1990 |title=A 50-ns 16-Mb DRAM with a 10-ns data rate and on-chip ECC |journal=IEEE Journal of Solid-State Circuits |volume=25 |issue=5 |page=1118 |bibcode=1990IJSSC..25.1118K |doi=10.1109/4.62132}}</ref>

[[Samsung]] released the first commercial DDR SDRAM chip (64{{nbsp}}[[Megabit|Mbit]]) in June 1998,<ref name="phys">{{cite news |title=Samsung Demonstrates World's First DDR 3 Memory Prototype |url=https://phys.org/news/2005-02-samsung-world-ddr-memory-prototype.html |access-date=23 June 2019 |work=[[Phys.org]] |date=17 February 2005 |language=en-us}}</ref> followed soon after by [[Hyundai Electronics]] (now [[SK Hynix]]) the same year.<ref name="hynix90s">{{cite web |title=History: 1990s |url=https://www.skhynix.com/eng/about/history1990.jsp |website=[[SK Hynix]] |access-date=6 July 2019 |archive-date=5 February 2021 |archive-url=https://web.archive.org/web/20210205032928/https://www.skhynix.com/eng/about/history1990.jsp |url-status=dead }}</ref> DDR SDRAM specification was finalized by [[JEDEC]] in June 2000 (JESD79).<ref>{{cite web | url = http://www.design-reuse.com/articles/13805/the-love-hate-relationship-with-ddr-sdram-controllers.html | title = The Love/Hate Relationship with DDR SDRAM Controllers}}</ref> JEDEC has set standards for the data rates of DDR SDRAM, divided into two parts. The first specification is for memory chips, and the second is for memory modules. The first retail PC motherboard using DDR SDRAM was released in August 2000.<ref name="iwill">{{Cite web|url=http://www.pcstats.com/releaseview.cfm?releaseID=317|title=Iwill Reveals First DDR Motherboard |website=PCStats.com|access-date=2019-09-09|archive-date=2016-11-07|archive-url=https://web.archive.org/web/20161107084737/http://www.pcstats.com/releaseview.cfm?releaseID=317|url-status=dead}}</ref>