at computex 2026, amd officially unveiled the expo-ull (ultra low-latency) memory specification, a key upgrade to the expo v1.2 standard. designed specifically for ultra-low latency scenarios, this technology expands the spd configuration file to define stricter cl timing parameters than those in the existing expo, precisely matching high-frequency ddr5 memory on mainstream amd platforms, such as ddr5‑6000 and ddr5‑6400.
asus was the first to respond, releasing a beta bios based on agesa comboam5 1.3.0.1b one week before the event, fully supporting rog crosshair x870e series motherboards. subsequently, msi and gigabyte quickly followed suit, rolling out expo-ull–compatible firmware for their x670, b650, and even a620 chipset motherboards—some msi models had already quietly integrated the relevant features in a bios update at the end of may, though they went largely unnoticed at the time since no official announcement had been made; meanwhile, gigabyte achieved full coverage across its entire x670 and b650 lineup.
asus has further extended its support to multiple x670e motherboards, including popular models like the rog hero, gene, extreme, as well as the proart creator wi‑fi and tuf gaming x670e‑a/e/f gaming wi‑fi series. only a few specific models have yet to receive an update, but compatibility is expected to be completed shortly.
in contrast, asrock has not yet released any bios versions that support expo-ull. its entire line of x870e and x670e motherboards remains on older agesa versions and has not yet been upgraded to comboam5 1.3.0.1b, making it the only major motherboard manufacturer among the six major brands that has not yet followed suit.
on the memory side, g.skill, kingston, kioxia, lexar, team group, allwinner technology, and adata have all joined the expo-ull ecosystem. the first ddr5 memory modules supporting this specification are expected to hit the market in batches throughout 2026, targeting professional users and overclockers who seek extreme performance and lightning-fast responsiveness.
