A recent AMD patent, US19/201,497 titled "High-bandwidth memory module architecture," is making the rounds again, with posts like this one on Reddit prompting all kinds of speculation about the "new" HB-DIMM memory technology that AMD is preparing. However, AMD is probably not preparing anything new; Instead, the new patent is actually a continuation of an older one that dates to 2022. The technology the company outlines has already been superseded by the new MRDIMM tech that's already shipping and supported by AMD.
The original patent, known as US12300346B2 and also titled "High-bandwidth memory module architecture," was superseded in 2023 by US20230178121A1, which is the specific document extended by the "new" filing that was actually published back in July. In other words, by no means is this a novel technology, and AMD's recent activity with these patents is almost assuredly a form of "bureaucratic housekeeping" — paper shuffling intended to help protect AMD's intellectual property.
