AMD EXPO 1.2 is moving beyond its initial announcement, with support expanding to new chipsets beyond the X870. New information from ASUS forums indicates support for CUDIMM, CSODIMM, and MRDIMM. For Zen 5 processors, CUDIMM support will be partial, with full compatibility expected for Zen 6. This means AMD is bringing EXPO 1.2 to more chipsets, including the B850, and the status of other chipsets remains to be seen.
EXPO (Extended Profiles for Overclocking) is AMD’s answer to Intel’s XMP, allowing users to easily load memory profiles and adjust frequencies, latencies, and other parameters without manual configuration. EXPO 1.2 introduces enhanced support for newer memory formats, particularly CUDIMM for desktops and CSODIMM for laptops. This expansion of support is significant for users looking to leverage these advanced memory technologies.
More Motherboards and Chipsets to Support AMD EXPO 1.2, Starting with Some B850 Models
The latest details emerge from ASUS’s beta BIOS updates for AM5 motherboards. Beta BIOS versions for X870 and X870E boards now include mentions of “Support the next enhancement version of EXPO,” clearly referring to EXPO 1.2. Specifically, ASUS lists Beta BIOS 2301 for ROG CROSSHAIR, ROG Strix, ProArt, and TUF X870 models, along with BIOS versions 0901 and 1670 for specific models.
However, the key revelation is that the B850 chipset is also slated to receive EXPO 1.2 support. ASUS has included beta BIOS 1670 for ROG Strix B850 and TUF Gaming B850 motherboards, featuring the same description about the upcoming enhanced EXPO version. This indicates that ASUS will officially provide EXPO 1.2 support for the B850 chipset, either fully or partially. This deployment confirms that support is not limited to the X870 chipset, at least within the ASUS ecosystem. Support for the A620 chipset, however, remains unconfirmed.
Zen 6 Memory Support Will Be Enhanced on Current Chipsets
Questions about support for the 600-series motherboards, specifically X670, have also been addressed. In response to a user’s inquiry about X670 support for EXPO 1.2, a direct official reply stated, “X670 and B650 need time.” This suggests that there is no cancellation or incompatibility, nor is EXPO 1.2 exclusive to older high-end and mid-range chipsets. It simply means that these boards require additional time for implementation, implying that EXPO 1.2 support will eventually be available for them.
Currently, X870 and B850 motherboards have beta BIOS with EXPO 1.2 listed, while X670 and B650 are awaiting updates. This is important given AMD’s commitment to the AM5 platform’s longevity, with many X670E, X670, B650E, and B650 boards remaining viable for future Ryzen processors. The ultimate goal is to provide the best possible support for upcoming CPUs, including the Ryzen 11000 series and beyond.
Regarding CUDIMM, these modules integrate CKD (Clock Driver) for improved signal stability in high-speed memory. While Zen 5 processors with AGESA 1.3.0.1 will offer partial CUDIMM support, full compatibility is expected with Zen 6. Current motherboards will rely on BIOS updates, AGESA versions, and manufacturer validation for CUDIMM implementation. While not ideal, this is the best AMD can offer for Zen 4 and Zen 5 with existing chipsets. Zen 6, along with new chipsets and motherboards, will represent a significant step forward. In summary, EXPO 1.2 is appearing in beta BIOS for X870 and B850, with X670 and B650 pending. CUDIMM support on Zen 5 should not be confused with full compatibility, which is currently reserved for Zen 6.
The entry AMD EXPO 1.2 will not be exclusive to X870: B850 boards begin to receive it and X670/B650 may include it first appeared on El Chapuzas Informático.
