ASRock’s Hudimm Standard: Single Subchannel for Budget Builds

ASRock Develops HUDIMM Memory Standard: DDR5 with Just One Sub-channel ASRock has introduced a latest memory standard called HUDIMM, or half unbuffered DIMM, aimed at lowering costs for entry-level and business desktop systems. The innovation uses DDR5 memory modules that populate only one of the two 40-bit sub-channels, effectively creating UDIMMs with half a rank of memory. According to the company, HUDIMM modules offer half the bandwidth and half the density of standard DDR5 UDIMMs even at their rated memory clock. The standard is designed to address affordability challenges in the current DDR5 market, particularly for users building budget-friendly systems or upgrading business desktops that require a modern platform for everyday tasks. ASRock partnered with Team Group to manufacture the first HUDIMM memory modules, which have been tested and confirmed to work on Intel 600-series, 700-series, and 800-series chipset motherboards. Support for the standard likely requires UEFI firmware updates, which ASRock plans to release for compatible boards. One notable feature of the HUDIMM standard is its compatibility with regular UDIMMs. Users can pair an HUDIMM with a standard UDIMM—for example, combining an 8 GB HUDIMM with a 16 GB UDIMM—to achieve asymmetric memory configurations such as 24 GB total capacity. This setup also provides the bandwidth equivalent of at least three DDR5 sub-channels. In addition to HUDIMM, ASRock has developed a related standard called HSODIMM, which applies the same single-sub-channel concept to DDR5 SO-DIMMs. Team Group will manufacture these modules as well, and ASRock intends to implement HSODIMM support in its Deskmini series mini-PCs built on mobile-on-desktop (MoD) platforms. The company emphasized that it is well-positioned to serve the client computing market during the ongoing DDR5 supply constraints. Beyond the HUDIMM and HSODIMM innovations, ASRock is also developing a new line of Socket LGA1700 motherboards that will include both DDR4 and DDR5 memory slots to offer greater flexibility to consumers and system builders.