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Check out Crucial NVMe SSDs Here: https://www.crucial.com/ Have you ever wondered why it takes time for computers to load programs or video games? Also, ever wonder why your computer uses both DRAM as well as SSDs when they both are used to store data? Well, most of that time is spent moving data from a hard drive or SSD into DRAM or Dynamic Random Access Memory, which is the working memory inside your computer. In this video, we're going to take a very deep dive into DRAM. We'll see how it connects to other parts of your computer, and then we'll explore how DRAM can store gigabytes of data in nanoscopic capacitors. After that, we'll cover the three main operations of DRAM: Reading, Writing, and Refreshing. And finally, we'll dive deep into some more complex aspects of DRAM that make it so amazingly fast such as folded DRAM architecture. We'll also learn what burst buffers are, and why there are so many banks of DRAM memory cells. Do you want to support in-depth engineering and technology education? Support us at: https://www.patreon.com/brancheducation Website: https://www.branch.education/ On Facebook: https://www.facebook.com/unsupportedbrowser On Twitter: https://twitter.com/TeddyTablante On Insta: https://www.facebook.com/unsupportedbrowser Thanks to Nathan, Peter, and Jacob for helping research and review this video! They're doctoral students at the Florida Institute for Cybersecurity Research, and you can learn more about their program here: https://fics.institute.ufl.edu/ Table of Contents: 00:00 - Intro to Computer Memory 00:47 - DRAM vs SSD 02:23 - Loading a Video Game 03:25 - Parts of this Video 04:07 - Notes 06:10 - Intro to DRAM, DIMMs & Memory Channels 10:43 - Crucial Sponsorship 12:09 - Inside a DRAM Memory Cell 15:28 - An Small Array of Memory Cells 17:41 - Reading from DRAM 19:38 - Writing to DRAM 21:55 - Refreshing DRAM 23:16 - Why DRAM Speed is Critical 25:06 - Complicated DRAM Topics: Row Hits 26:21 - DRAM Timing Parameters 27:51 - Why 32 DRAM Banks? 29:17 - DRAM Burst Buffers 30:58 - Subarrays 32:02 - Inside DRAM Sense Amplifiers 34:24 - Outro to DRAM Key Branches from this video are: How do Solid State Drives Work? Erratum: At 10m 08s : Cicruit || Should be Circuit At 21m 54s : 32 Bank Groups || Should be 32 Banks. Script, Modeling, Animation: Teddy Tablante Twitter: @teddytablante Animation: Mike Radjabov Modeling: Prakash Kakadiya Voice Over: Phil Lee Sound Design: www.drilu.mx Music Editing: Luis Zuleta Sound Effects: Paulo de los Cobos Supervising Sound Editor and Mixer: Luis Huesca Animation built using Blender 3.1.2 https://www.blender.org/ Post with Adobe Premiere Pro References: DDR5 SDRAM. JEDEC Standard. JESD79-5 July 2020 Dr. Cutress, Ian. "Insights into DDR5 Sub-Timings and Latencies". Oct 6th, 2020. Dr. El-Maleh, Aiman. "Functions and Functional Blocks: Digital Logic Design" College of Computer Sciences and Engineering. King Fahd University of Petroleum and Minerals. Hajimiri, Ali. Et al. "Design Issues in Cross-Coupled inverter Sense Amplifier". IEEE. Stanford University 1998 IBM. Understanding DRAM Operation. IBM 1996. Jacob, Bruce. NG, Spencer W. Wang, David T. "Memory Systems: Cache, DRAM, Disk." Elsevier Inc. 2008 Keeth, Brent. Baker, R Jacob. Johnson, Brian. Lin, Feng. "DRAM Circuit Design: Fundamental and High-Speed Topics." IEE Press 2008. Kim, Yoongu et. Al. "A Case for Exploiting Subarray-Level Parallelism in DRAM". Carnegie Mellon University Lee, Donghuk et.al. "Tiered-Latency DRAM: A Low Latency and Low Cost DRAM Architecture. Carnegie Mellon University Micron. "DDR4 SDRAM. MT40A4G4. MT40A2G8. MT40A1G16. 16Gb: x4, x8, x16 DDR4 SDRAM Features" Micron Technologies 2018 Micron. "DDR5 SDRAM Product Core Data Sheet DDR5SDRAM Features." Micron Technologies 2020 Ryan, Kevin J. Morzano, Christopher K. Li, Wen. "Write Data Masking for Higher Speed DRAMS" US Patent 6532180 B2 Mar. 11 2003. Shilov, Anton. "SK Hynix Details DDR5-6400". ANANDTECH. Feb 26th, 2019. Sunami, Hideo. "Dimension Increase in Metal-Oxide Semiconductor Memories and Transistors". From intechopen.com. From "Advances in Solid State Circuit Technologies". Apr 2010. Wikipedia contributors. "CAS Latency". "DDR5 SDRAM". "Dynamics Random-Access Memory". "Memory Timing". "Synchronous Dynamic Random-Access Memory". Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, Visited Nov 2022