--- title: AMD EPYC 9005 Series Memory Scaling Performance From 4... description: A benchmark study examines how AMD EPYC 9655 dual-socket server performance scales when populating between 4 and 24 DDR5-6400 RDIMM memory modules, using a... canonical: https://daily.dev/posts/amd-epyc-9005-series-memory-scaling-performance-from-4-to-24-ddr5-rdimms-review-xtsgiwhvt twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: AMD EPYC 9005 Series Memory Scaling Performance From 4 To 24 DDR5 RDIMMs Review | daily.dev og:description: A benchmark study examines how AMD EPYC 9655 dual-socket server performance scales when populating between 4 and 24 DDR5-6400 RDIMM memory modules, using a... og:url: https://daily.dev/posts/amd-epyc-9005-series-memory-scaling-performance-from-4-to-24-ddr5-rdimms-review-xtsgiwhvt og:image: https://api.daily.dev/og/posts/xTsGIwHvt.png og:image:alt: AMD EPYC 9005 Series Memory Scaling Performance From 4 To 24 DDR5 RDIMMs Review og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # AMD EPYC 9005 Series Memory Scaling Performance From 4 To 24 DDR5 RDIMMs Review **[Phoronix](https://daily.dev/sources/phoronix)** · 2 min read · 0 upvotes · 0 comments ## Summary A benchmark study examines how AMD EPYC 9655 dual-socket server performance scales when populating between 4 and 24 DDR5-6400 RDIMM memory modules, using a Dell PowerEdge R7725 server. Given current DDR5 memory pricing (over $8,260 per 64GB RDIMM, pushing a full 24-module config past $198,000), the tests aim to help organizations decide whether partially populating memory channels is a worthwhile cost trade-off. More than 250 benchmarks were run on Ubuntu 26.04 LTS with the Linux 7.0 kernel across 4/8/10/12/16/20/24 memory channel configurations. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Does reducing the number of populated DDR5 RDIMM memory channels hurt performance on AMD EPYC 9655 servers? Populating fewer memory channels on a dual AMD EPYC 9655 server does affect performance, and benchmarks measured the impact across configurations of 4, 8, 10, 12, 16, 20, and 24 DDR5-6400 RDIMMs on a Dell PowerEdge R7725. This was tested with over 250 benchmarks on Ubuntu 26.04 LTS with the Linux 7.0 kernel, without other hardware or software changes, specifically to help decide if reduced channel counts are a worthwhile cost trade-off. _daily.dev surfaces benchmark data like this for teams weighing memory channel trade-offs against DDR5 pricing._ ### How much does a fully populated 24 DIMM DDR5-6400 configuration cost on a Dell PowerEdge R7725 with AMD EPYC 9655? A full 24 x 64GB DDR5-6400 RDIMM configuration costs around $198,240 USD in memory alone, based on Dell's listed price of $8,260.92 per module, bringing the total server cost with dual EPYC 9655 96-core processors to roughly $222,000 USD at current list prices. _engineers pricing out EPYC server builds can track hardware cost breakdowns like this through daily.dev._ ## Similar posts on daily.dev - [Intel Xeon 6 Granite Rapids Memory Scaling Performance From 6 To 12 MRDIMMs Review](https://daily.dev/posts/intel-xeon-6-granite-rapids-memory-scaling-performance-from-6-to-12-mrdimms-review-vafwlt61x) · Phoronix · 0 upvotes · 0 comments - [Micron Develops Ultra-Dense 512-GB DDR5 Memory Module](https://daily.dev/posts/micron-develops-ultra-dense-512-gb-ddr5-memory-module-nwc1w1p3l) · Embedded.com · 0 upvotes · 0 comments - [DDR5-4800 vs. DDR5-6000 Performance With The AMD Ryzen 7 9850X3D In 300\+ Benchmarks Review](https://daily.dev/posts/ddr5-4800-vs-ddr5-6000-performance-with-the-amd-ryzen-7-9850x3d-in-300-benchmarks-review-u4mdzkuph) · Phoronix · 1 upvotes · 0 comments - [Your motherboard has four RAM slots, but filling all four can make your DDR5 slower](https://daily.dev/posts/your-motherboard-has-four-ram-slots-but-filling-all-four-can-make-your-ddr5-slower-awdrconod) · XDA Developers · 0 upvotes · 0 comments --- Tags: [#linux](https://daily.dev/tags/linux) [View this post on daily.dev](https://daily.dev/posts/amd-epyc-9005-series-memory-scaling-performance-from-4-to-24-ddr5-rdimms-review-xtsgiwhvt) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"AMD EPYC 9005 Series Memory Scaling Performance From 4 To 24 DDR5 RDIMMs Review","url":"https://daily.dev/posts/amd-epyc-9005-series-memory-scaling-performance-from-4-to-24-ddr5-rdimms-review-xtsgiwhvt","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/amd-epyc-9005-series-memory-scaling-performance-from-4-to-24-ddr5-rdimms-review-xtsgiwhvt"},"datePublished":"2026-08-19T14:29:22.931Z","dateModified":"2026-08-19T16:01:02.034Z","description":"A benchmark study examines how AMD EPYC 9655 dual-socket server performance scales when populating between 4 and 24 DDR5-6400 RDIMM memory modules, using a...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7e0a7376a7bbfeb6725672f8b18ad5a0?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7e0a7376a7bbfeb6725672f8b18ad5a0?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Phoronix","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Phoronix","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/6a26ba379dd64932830aa0c9803dd7ee","url":"https://daily.dev/sources/phoronix"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/amd-epyc-9005-series-memory-scaling-performance-from-4-to-24-ddr5-rdimms-review-xtsgiwhvt","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"linux","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Phoronix","item":"https://daily.dev/sources/phoronix"},{"@type":"ListItem","position":3,"name":"AMD EPYC 9005 Series Memory Scaling Performance From 4 To 24 DDR5 RDIMMs Review"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/amd-epyc-9005-series-memory-scaling-performance-from-4-to-24-ddr5-rdimms-review-xtsgiwhvt#faq","mainEntity":[{"@type":"Question","name":"Does reducing the number of populated DDR5 RDIMM memory channels hurt performance on AMD EPYC 9655 servers?","acceptedAnswer":{"@type":"Answer","text":"Populating fewer memory channels on a dual AMD EPYC 9655 server does affect performance, and benchmarks measured the impact across configurations of 4, 8, 10, 12, 16, 20, and 24 DDR5-6400 RDIMMs on a Dell PowerEdge R7725. This was tested with over 250 benchmarks on Ubuntu 26.04 LTS with the Linux 7.0 kernel, without other hardware or software changes, specifically to help decide if reduced channel counts are a worthwhile cost trade-off. daily.dev surfaces benchmark data like this for teams weighing memory channel trade-offs against DDR5 pricing."}},{"@type":"Question","name":"How much does a fully populated 24 DIMM DDR5-6400 configuration cost on a Dell PowerEdge R7725 with AMD EPYC 9655?","acceptedAnswer":{"@type":"Answer","text":"A full 24 x 64GB DDR5-6400 RDIMM configuration costs around $198,240 USD in memory alone, based on Dell's listed price of $8,260.92 per module, bringing the total server cost with dual EPYC 9655 96-core processors to roughly $222,000 USD at current list prices. engineers pricing out EPYC server builds can track hardware cost breakdowns like this through daily.dev."}}]} ```