Zen 5 & Zen 6 EPYC Core Counts Leaked: Ryzen Clues Within
Previous reports have suggested that the Zen 6 architecture will feature three distinct CCD versions: Standard, Dense Classic, and Client Dense, utilizing higher bandwidth 2.5D interconnect technology. However, these developments are anticipated for late 2025 to 2026, and detailed information remains sparse. Recently, details about AMD’s next-generation Zen 5 and subsequent Zen 6 architecture processors have been disclosed.
@InsLatX64 revealed the core configurations of the new EPYC processors, including specific CCD information. Notably, AMD’s Zen architecture CCDs are common across both server and consumer segments, allowing us to infer the core configurations of future Ryzen processors. @Kepler_L2 further elaborated on the specific core configurations of the Zen 6 CCD.
First, let’s examine the imminent Zen 5 architecture, likely to debut at next month’s Computex in Taipei and officially launch in the third quarter of this year. The Zen 5 and Zen 5c CCDs will be more compact than the current Zen 4, enabling more CCDs within the same space. The existing EPYC 9004 series processors can accommodate up to 12 Zen 4 CCDs or 8 Zen 4c CCDs. In contrast, the forthcoming EPYC 9005 series will support up to 16 Zen 5 CCDs or 12 Zen 5c CCDs, significantly increasing the maximum core count from 96 and 128 cores to 128 and 192 cores, respectively. Additionally, each Zen 5c CCX will expand from 8 cores to 16 cores, with one CCX per CCD, thereby reducing communication latency.
Regarding the Zen 6 architecture, it encompasses three CCD types: 8-core, 16-core, and 32-core. Among them, the 8-core CCD is the most common, while the status of the 16-core and 32-core versions as Zen 6c remains uncertain. It is known that a single Zen 6 CCX can reach up to 32 cores, with one CCX per CCD, allowing an EPYC processor to integrate up to 8 CCDs, resulting in a single processor potentially achieving 256 cores.
Should AMD implement this 32-core CCD in Ryzen processors, a single Ryzen processor could reach up to 64 cores. However, this 32-core CCD is likely a Zen 6c variant with a lower frequency. Thus, the probability of AMD directly integrating two such CCDs into a Ryzen processor is low, but an 8+32 core combination is entirely feasible.
