AMD's 256-core EPYC packs 16-channel DDR5-12800, hitting 91% of RTX 5090 memory bandwidth
Dany0 · reddit · 2026-09-29
AMD's new 256-core EPYC CPUs feature 16-channel DDR5-12800, reaching 91% of an RTX 5090's memory bandwidth — sparking jokes on r/LocalLLaMA.
Community reactions: quips like "Sir this is LocalLLaMA not RichPeopleofLocalLLaMA," skepticism about real-world token speeds ("All this for 1.5 tok/s?"), and mockery of the price of a 2TB DDR5-12800 RDIMM kit. The substance: pure-CPU memory bandwidth is now nearly on par with a consumer flagship GPU, but cost-efficiency remains absurd.
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