AMD EXPO Ultra Low Latency support expands to older AM5 motherboards

Asus and MSI have released new BIOS updates based on AGESA ComboAM5 1.3.0.1b, bringing AMD EXPO Ultra Low Latency (ULL) support to older 600-series AM5 motherboards.

As noted by VideoCardz, the feature is currently available on selected Asus X670E motherboards, including the ROG Crosshair X670E Hero, Gene, and Extreme. Download links for BIOS 3803 are also live for the ROG Strix X670E-A, X670E-E, X670E-F, and ProArt X670E Creator WiFi. Other models like the ROG Strix X670E-I Gaming WiFi, TUF Gaming X670E-Plus, and TUF Gaming X670E-Plus WiFi currently show placeholder “38XX” names, indicating their builds are not yet available.

This update introduces three new DRAM timing controls to Ai Tweaker and DRAM Timing Control: “TccdL”, “TccdL_WR”, and “TccdL_WR2”. These releases are still in beta, meaning users with stable configurations might want to wait for the final versions.

MSI is also rolling out AGESA PI-1.3.0.1b updates with an “Optimized with AMD EXPO Technology: Featuring Ultra Low Latency” note for its own AM5 lineup. AMD states that its EXPO Ultra Low Latency feature targets tighter DDR5 sub-timings to reduce latency. The chipmaker claims this offers up to 4% higher average FPS than standard EXPO and up to 13% higher than JEDEC DDR5 when tested on a Ryzen 7 9700X system.

KitGuru says: It is nice to see motherboard vendors backward-porting features like EXPO ULL to older AM5 boards, saving users from needing an immediate upgrade.

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