EPYC Genoa can handle down to one memmory channel configurations while for this testing the focus was on 6 memory channels and above - simply for not being too memory constrained, reducing the testing burden with having a lot of different tests being limited by this lone EPYC Genoa server at the moment, and the low likelihood of users procuring a higher-tier EPYC 9004 series processor and running in such a RAM limited scenario. All of the memory was 64 GB DDR5-4800MT/s Samsung M321R8GA0BB0-CQKEG memory modules, kindly supplied by AMD as part of the EPYC Genoa review kit. With the AMD Titanite reference server and dual EPYC 9654 64-core processors, I completed various (mostly real-world focused) benchmarks at 6, 8, 10, and 12 memory channels. So going for 12 DIMMs or even 24 DIMMs for a two socket AMD 4th Gen EPYC server can quickly add up. The 64GB DDR5-4800 server memory modules are retailing for around $350. For the very first Ryzen, this was DDR4-3200. A sweetspot frequency in AMD jargon is an inflection of performance, stability, cost, and ease. Obviously though not all workloads are very memory intensive, so these benchmarks are intended both as a mix of benchmarks showing how the EPYC 9654 2P performance responded under a mix of workloads whether you are trying to gauge if it's worthwhile initially going for 12 (or 24) DIMMs or simply need some independent numbers to help justify the expenditure to your boss/management.įor those that haven't looked at DDR5 server memory pricing, as of writing the cheapest DIMMs I have seen are the Samsung DDR5-4800 16GB memory modules at around $100 USD or $183 USD for the 32GB version. Aug 31st, 2022 22:07 Discuss (21 Comments) AMD in its Discord AMA confirmed DDR5-6000 to be the 'sweetspot' memory overclock for its upcoming Ryzen 7000 'Zen 4' processors. Thus I set out to run some benchmarks over the holidays looking at the EPYC Genoa performance from 6 up through 12 memory channels with these Zen 4 server processors.įor memory intensive workloads the scaling up through 12 channels was there and the EPYC 9654 processors proved they could effectively make use of all twelve memory channels per socket. But the cost of populating all 12 memory channels - especially with initial DDR5 server memory pricing - may be too much to handle at once for some deployments and tougher to justify within organizations during these turbulent economic times. This is a big upgrade over prior generations of EPYC processors with eight channels of DDR4-3200 memory and what is found with current Xeon Scalable "Ice Lake" processors. In this article is a wide assortment of benchmarks looking at the AMD EPYC 9654 performance across varying numbers of populated DDR5 memory channels.ĪMD 4th Gen EPYC processors support twelve DDR5 memory channels at DDR5-4800 speeds and can handle up to 6TB of addressable memory per socket. (My use case is mainly data analysis - was also considering the Threadripper Pros but these are prohibitively expensive, or the Max Studio with the M1 Ultra chip (20 cores) and 128GB which has like ten times the memory bandwidth of 128GB DDR5 at 3600 MT/s on Ryzen 7950x currently).In addition to the big performance uplift from AVX-512, up to 96 cores per socket, and other Zen 4 architectural improvements, also empowering the EPYC 9004 "Genoa" processors is the support for up to 12 channels of DDR5-4800 memory. Or is this not how it works and will I have to upgrade both the motherboard and memory in the future? Of if 64GB RAM sticks at some point become reality, or 4 DDR5 32GB sticks that run well at 6000 MT/s, would I be able to just swap out the RAM and use that ‘new’ RAM on the motherboard that I would buy today? The Ryzen 7000 desktop CPUs will boost to frequencies above 5.5 GHz. A new Zen 4-powered EPYC or Threadripper CPU with 128C/256T will also support up to 12-channel DDR5-5200 memory. I was wondering, if this happens, will I have to upgrade both the motherboard and RAM? Or can I buy a good motherboard right now and RAM currently available, and will ‘firmware’ updates on the motherboard in the future allow the RAM to run at higher speeds? Posted in CPUs AMD DDR5 Zen 4 AM5 LGA1718 Ryzen 7000. However things will improve in the next months / years. AMD Zen 4 Ryzen 9 7950X and Ryzen 5 7600X Review: Retaking The High-End by Ryan Smith & Gavin Bonshor on Septem9:00 AM EST. New AMD Ryzen 7000 Zen 4 CPU rumors such as Ryzen 7 7700X & Ryzen 5 7600X performance and Ryzen 9 7950X overclocking have been revealed. Right now 128GB DDR5 is not as stable yet and the base speed of it is 3600 MT/s (given 4 sticks of 32GB x 4 on the 2 memory channels) and it’s harder to overclock. AMD in its Discord AMA confirmed DDR5-6000 to be the 'sweetspot' memory overclock for its upcoming Ryzen 7000 'Zen 4' processors.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |