ASRock Develops HUDIMM Memory Standard: DDR5 with Just One Sub-channel

You know we’ve hit rock-bottom with memory affordability when ASRock innovates a new memory standard to lower prices. The new “HUDIMM,” or half unbuffered DIMM, is an ASRock-innovated standard. It calls for UDIMMs with half a rank of memory, populating just one of the two 40-bit sub-channels. Such a DIMM would only offer half its bandwidth even at its rated memory clock, and of course half the density. The HUDIMM standard is targeted at entry-level builds and business desktops that just want a modern platform for everyday tasks, and something to tide over the DDR5 memory crunch. ASRock partnered with Team Group to manufacture the first HUDIMM memory modules, which it tested to work on its Intel 600-series, 700-series, and 800-series chipset motherboards. HUDIMM support probably requires some UEFI firmware-level awareness of the standard, and ASRock is expected to release firmware updates for the same.

Here’s the fun part—ASRock made it possible for end-users to pair HUDIMMs with regular UDIMMs that have two 40-bit sub-channels; for example, pairing an 8 GB HUDIMM with a 16 GB UDIMM, to achieve asymmetric capacities such as 24 GB, and the bandwidth of at least 3 DDR5 sub-channels. ASRock also developed HSODIMM, which—you guessed it—is a DDR5 SO-DIMM with just one sub-channel. Team Group will manufacture these HSODIMMs, and ASRock’s Deskmini series mini-PCs that are based on MoD (mobile on desktop) platforms, will implement support for them. ASRock is perfectly faced to address the client computing market during the DDR5 famine; besides the HUDIMM/HSODIMM innovation, the company is developing a new crop of Socket LGA1700 motherboards with both DDR4 and DDR5 memory slots.