Computer Forum
AMD EXPO Ultra Low Latency (Image © AMD)
For ASUS users, the update is currently available for several X670E models. The ROG Crosshair Hero, Gene and Extreme as well as the ROG Strix X670E-A, X670E-E and X670E-F and the ProArt X670E Creator WiFi have received BIOS version 3803. Other models, including the ROG Strix X670E-I Gaming WiFi and the TUF Gaming X670E-Plus series, are listed with placeholders, indicating that their specific builds are still pending.
These BIOS updates introduce specific memory optimization options in the “Ai Tweaker” and “DRAM Timing Control” menus. Users will find three new parameters there: TccdL, TccdL_WR and TccdL_WR2. These updates also provide compatibility for the 20th anniversary ROG ARCANA DDR5 memory kits.
MSI is following a similar course, releasing AGESA PI-1.3.0.1b updates for a selection of its AM5 motherboards. These releases specifically mention the optimization provided by AMD EXPO technology with a focus on Ultra Low Latency, confirming that this feature is no longer exclusive to the latest motherboard series.
AMD EXPO Ultra Low Latency was introduced as part of the EXPO 1.2 memory specification. The technology was designed to streamline DDR5 sub-timings to reduce overall system latency. According to data collected by AMD using a Ryzen 7 9700X test system, the ULL profile can result in an average frame rate increase of up to 4% over standard EXPO settings and up to 13% compared to baseline JEDEC DDR5 memory.
