AMD's X970E chipset rumored to reuse the PROM21 chipset, but with native support for CUDIMM

Taiwanese hardware manufacturer Biostar recently teased next-gen AMD motherboards planned to be showcased at Computex 2026. The PR announcement has since been quietly edited, with the "next-generation" wording removed, which likely means AMD wasn't ready to go public yet or Biostar got a little too excited. The company didn't name a specific chipset, but the wording points to a new AM5 board lineup, something in the vein of an X970E, though nothing is confirmed.

That's not the most interesting part of this story, though. A new leak from MEGAsizeGPU suggests AMD's next-generation AM5 platform may reuse the same Promontory 21 chipset found in all existing AM5 motherboards. The difference from the current 800-series and previous 600-series boards could come in the form of add-on features, new BIOS-level software capabilities, and significantly overhauled memory support.

That memory support could include full compatibility with both CUDIMM and CAMM modules, rather than only partial compatibility added via recent AGESA updates. CUDIMM, or Clocked Unbuffered DIMM, incorporates an onboard clock driver that helps support higher memory speeds. CAMM, or Compression Attached Memory Module, is a thinner memory form factor designed primarily for laptops and high-volume OEM desktop systems, using a compression connector to save space.

Current Ryzen 7000, 8000G, and 9000 CPUs can use CUDIMM modules but only in bypass mode, since their memory controllers lack true native CUDIMM support. To enable these modules to function, manufacturers have provided EXPO 1.2 compatibility via AGESA updates, but full CUDIMM support is planned for future Zen 6-based Ryzen desktop CPUs.

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With its next-gen Ryzen Olympic Ridge desktop processors, AMD is introducing a new client I/O die, likely built on a 4nm node. This new cIOD is expected to feature updated DDR5 memory controllers with support for higher DRAM clock speeds, tighter timings, and native CUDIMM and CAMM support. It remains to be seen if new boards will enable full CUDIMM support for existing AM5 CPUs or if that requires Ryzen 10000 processors.

AMD could potentially reveal something big at Computex, but it's worth keeping expectations in check. Next-generation AMD desktop processors are not expected until 2027, so a Computex showing would likely be a platform preview rather than a full product launch.