Danny Weber
Intel's new HUDIMM DDR5 memory reduces costs by using a single 32-bit channel, but tests show bandwidth drops by nearly half. Learn about performance impacts.
Intel has introduced a new DDR5 memory standard called HUDIMM in collaboration with partners, aimed at reducing module costs. The core concept involves using just one 32-bit channel instead of the two found in traditional UDIMMs, which simplifies the design and lowers production expenses. Initial modules are expected in 8GB and 12GB capacities and will be compatible with standard memory in the same system.
However, real-world tests reveal that this cost-saving measure comes with a significant performance penalty. In experiments where standard UDIMM modules were artificially switched to HUDIMM mode, memory bandwidth dropped by nearly half. For instance, at the same 7200 MT/s frequency, read speeds fell from about 59 GB/s to 32 GB/s, with similar results in other configurations.
Interestingly, latency remained largely unchanged at around 85–87 nanoseconds, indicating that the primary impact is on bandwidth. Even in dual-channel mode, the gap remains substantial: full-featured modules deliver over 100 GB/s, while the trimmed-down versions struggle to reach 60 GB/s.
Overall, this new standard presents a trade-off for users. On one hand, it paves the way for more affordable memory, which is particularly relevant amid rising prices. On the other hand, the performance losses could make these modules less appealing for gamers and demanding applications where memory speed is crucial.
© A. Krivonosov