ASUS & MSI Release BIOS Update X670E Supporting EXPO-ULL
Good news for AMD gamers seeking better performance. ASUS and MSI have officially rolled out UEFI firmware updates for high-end X670E platforms, introducing AMD EXPO-ULL (Ultra-Low Latency) technology. The update is based on AGESA 1.3.0.1b microcode and aims to deliver exceptional responsiveness by optimizing memory subtimings.
EXPO-ULL made its debut at the recently concluded Computex 2026. Unlike traditional overclocking, this technology focuses on memory latency optimization. Official data shows that memory latency can be reduced by about 5-7ns when enabled. With DDR5-6000 configurations, CAS latency can be further pushed down from the common CL30 to CL26.
| Memory Configuration | Speed (MT/s) | CAS Latency | FPS Improvement |
| JEDEC Standard | 4800 / 5200 | CL40 - CL46 | Baseline (100%) |
| Standard EXPO | 6000 | CL30 / CL36 | +9% |
| EXPO-ULL | 6000 | CL26 | +13% |
First Batch of Supported Products
🦅 ASUS Series
- ROG Crosshair: Extreme, Hero, Gene
- ROG Strix: X670E-A, X670E-E, X670E-F
- Stylish Productivity: ProArt X670E-Creator WiFi
🐉 MSI Series
- Flagship Support: MEG X670E GODLIKE
- Mainstream Pick: MAG X670E Tomahawk WiFi
- Entry-Level Compatibility: PRO A620M-E
▫️ Compatible Memory: ASUS ROG ARCANA DDR5 20th Anniversary Edition, and third-party CUDIMM (Clocked Unbuffered DIMM Modules).
The BIOS released so far are Beta versions. Some users have reported seeing related BIOS versions for models like the B650 and X670E GAMING PLUS WIFI as well. Please note that the performance gains and stability of EXPO-ULL depend on the quality of the memory ICs and the CPU's memory controller. Productivity users are advised to wait for the official release, and back up your data before updating.
Overall, EXPO-ULL seems like another step for AMD's AM5 platform to further enhance the memory experience. It may not immediately bring a massive improvement for every user, but for those looking to grab a new DDR5 kit or gamers who enjoy tweaking low-latency memory, the follow-up from motherboard and memory manufacturers will be worth watching.
