New cost-effective DDR5 memory ‘HUDIMMs’ show around 50% reduction in throughput with single subchannel — Two HUDIMMs are as fast as a single stick of regular DDR5 RAM

HUDIMM is being proposed as a cheaper memory spec using only 1x 32-bit subchannel per stick instead of 2x 32-bit in order to populate less ICs. Turns out, halving the bandwidth like that actually slashes the performance in half too, alongside the expected capacity reduction. Two HUDIMMs running in dual channel perform similar to a single regular DDR5 stick.