AMD's next-gen Zen 6-based Ryzen "Medusa" CPUs will allegedly feature two memory controllers, leading to changes in DDR5 orientation.
AMD Ryzen "Medusa" CPUs With Zen 6 Architecture To Adopt New Changes Within The Memory Controller
According to Uniko's Hardware, a new rumor afloat on Chinese forums talks about the next-gen AMD Zen 6-based Ryzen CPUs, codenamed Medusa. The information suggests some changes within the IMC (Integrated Memory Controller) that would lead to a different DIMM orientation requirement.
As per the report, the AMD Ryzen CPUs featuring the Zen 6 core architecture will feature two IMCs. It is not clear if these are dual IMCs within the silicon or two separate IMCs, but it looks like this will lead to changes within the DDR5 memory orientation requirements. Further diving into the info, it is stated that one of the IMCs features support for just 1 DIMM per Channel (or 1DPC). So you can use two DIMMs in such configurations.
Currently, AMD's AM5 motherboards utilize the first DIMM slots, labeled as A0 and B0, for the initial boot configuration to go smoothly and that's the preferred orientation. But with the new IMC, it will change the orientation to A1 and B1 DIMM slots, so Zen 6 is allegedly not compatible with the older 1DPC orientation. On several AM5 motherboards, the A2 and B2 slots are labeled as first, but these are four DIMM designs. This compatibility might only be specific to Zen 6 CPUs on 2-DIMM boards such as Mini-ITX and mATX designs (only a few overclockers-specific ATX motherboards feature two DIMM designs).
AMD is also said to be working on opening up support for A0 / B0 memory orientations once these chips roll out, but the performance is said to be inferior compared to A1 / B1 configurations. MSI's MPOWER AM5 motherboard is said to fully comply with this new configuration, though we have to wait for the official Zen 6-based Ryzen "Medusa" announcement to see how the new chips work out and what kind of compatibility is offered on existing AM5 motherboards.
With that said, the Zen 6-based desktop lineup is scheduled for release next year and brings several updates in terms of core count and cache increases alongside the architectural updates.
About the author: A Software Engineer by training and a PC enthusiast by passion, Hassan Mujtaba serves as Wccftech's Senior Editor for hardware section. With years of experience in the industry, he specializes in deep-dive technical analysis of next-generation CPU and GPU architectures, motherboards, and cooling solutions. His work involves not only breaking news on upcoming technologies but also extensive hands-on reviews and benchmarking.
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