Explaining Server DDR5 RDIMM vs. UDIMM Differences

DDR5 memory is not just a simple speed upgrade. It is absolutely essential for AMD EPYC and Intel Xeon servers as we go forward. In this video, we explain why we need DDR5, explain the differences between DDR4 and DDR5, show off components like the new RCD, PMIC, and SPD hub, and finally, talk about performance and CXL. As a bonus, we also demonstrate why you can no longer use UDIMMs in DDR5 RDIMM slots, even if they are ECC UDIMMs. STH Main Site Article: https://www.servethehome.com/why-ddr5-is-absolutely-necessary-in-modern-servers-micron/ STH Top 5 Weekly Newsletter: https://eepurl.com/dryM09 ---------------------------------------------------------------------- Become a STH YT Member and Support Us ---------------------------------------------------------------------- Join STH YouTube membership to support the channel: https://www.youtube.com/channel/UCv6J_jJa8GJqFwQNgNrMuww/join STH Merch on Spring: https://the-sth-merch-shop.myteespring.co/ ---------------------------------------------------------------------- Where to Find STH ---------------------------------------------------------------------- STH Forums: https://forums.servethehome.com Follow on Twitter: https://twitter.com/ServeTheHome Follow on LinkedIn: https://www.linkedin.com/company/servethehome-com/ Follow on Facebook: https://www.facebook.com/ServeTheHome/ Follow on Instagram: https://www.instagram.com/servethehome/ ---------------------------------------------------------------------- Timestamps ---------------------------------------------------------------------- 00:00 Introduction 01:52 DDR4 vs DDR5 Differences and UDIMM vs RDIMM Differences 04:08 DDR5 now has TWO Channels 05:39 New chips and components on DDR5 RDIMMs 06:40 On-chip ECC on DDR5 versus ECC UDIMM and RDIMMs 08:57 Why Servers NEED DDR5 with AMD EPYC and Intel Xeon 11:52 Performance Impact of DDR5 14:37 CXL and the DDR5 Future 16:00 DDR5 Server Memory Summary 16:51 Wrap-up ---------------------------------------------------------------------- Other STH Content Mentioned in this Video ---------------------------------------------------------------------- - 4th Gen Intel Xeon Scalable Sapphire Rapids Launch: https://youtu.be/zIWlXjxyIuM - AMD EPYC 9004 "Genoa" Launch: https://youtu.be/8QaxFsgQ0vk - Non-binary DDR5 and more: https://youtu.be/6OynG7ydSQA - Compute Express Link or CXL: https://youtu.be/Mp9L7OClb2U