Asus confirms that its motherboards support half‑length DDR5 HUTIMM.

Asus explores DDR5 HUDIMM with a single 32-bit subchannel

A member of the Asus ROG research team, Bing Lin, reported that the company is conducting experiments with DDR5 HUDIMM memory that uses only one 32‑bit subchannel. The demonstration took place on an ROG Maximus Z890 Apex motherboard – an LGA 1851 platform supporting Intel 600-, 700- and 800-series processors.

What was shown
- DDR5 24 GB modules: two modified 24 GB modules each were limited to one subchannel. As a result, the system displayed a total memory capacity of only 24 GB instead of 48 GB.
- TeamGroup 8 GB module: also with a single subchannel, operating on the same Z890 Apex platform.
- Lin noted that he had previously tested a similar idea by masking part of a module and disabling half the channels via BIOS. This time a specially designed DIMM module with one 32‑bit subchannel was used.

Why it matters
A standard DDR5 DIMM consists of two independent 32‑bit subchannels. ASRock’s HUDIMM technology allows using only one subchannel, which, according to company representatives, halves the number of chips on the module. This should reduce manufacturing costs and, consequently, the price for the end consumer.

TeamGroup partnered in developing the memory. In a press release, ASRock cites Robert Hallock, vice president and senior manager of technical marketing for Intel’s client segment, who supports the adoption of HUDIMM on 600-, 700- and 800-series platforms.

What remains unknown
- Asus is only confirming work on support for this type of memory; it is unclear whether the company will collaborate with DIMM manufacturers and integrate support into official drivers for LGA 1851.
- The choice of ROG Maximus Z890 Apex as a demo platform is explained by the fact that the board is designed to accommodate only two memory modules, making it convenient for testing and demonstrating HUDIMM capabilities.

Thus, Asus continues to explore the prospects of DDR5 HUDIMM but has not yet announced specific plans for commercial release or compatibility with mainstream Intel platforms.