MSI shows how High-Efficiency Mode delivers EXPO ULL memory speeds

MSI has detailed the new performance optimisations within its Click BIOS X platform, focusing on AMD EXPO Ultra Low Latency (EXPO ULL) support and its built-in High-Efficiency Mode. These two features target reduced RAM latency to improve frame rates in gaming without requiring manual sub-timing adjustments, but while one requires ULL-certified modules, the other doesn't.

AMD EXPO ULL tightens memory sub-timings to lower latency directly out of the box. When compatible modules are installed, MSI Click BIOS X automatically displays an “ULL” indicator for profile selection. Internal testing using AIDA64 on an AMD Ryzen 7 9800X3D and MSI B850MPOWER system showed standard EXPO 6000 MT/s memory (CL30-38-38-96) latency sitting at 79.4ns. Switching to an EXPO ULL profile (CL30-38-38-32) reduced that latency to 71.4ns.

For users running standard EXPO kits, MSI highlights its High-Efficiency Mode feature, which includes Tightest, Tighter, Balance, and Relax presets. Enabling the “Tightest” preset on a standard EXPO module dropped latency from 79.4ns down to 71.6ns, yielding performance comparable to a dedicated EXPO ULL kit. Applying High-Efficiency Mode to an active EXPO ULL profile resulted in marginal gains, reducing latency slightly from 71.4ns to 71.1ns.

MSI notes that High-Efficiency Mode alters memory timings, which can lead to system instability depending on hardware configurations. So, those interested in trying out the feature should note that changing the setting may lead to some instability. Those who want to try it may have to update their BIOS. Once updated, go to the Advanced mode and search for the overclocking tab. There, you'll find the High-Efficiency Mode switch and the Memory Timing Preset options.

KitGuru says: If you're running standard EXPO RAM on an MSI board, toggling High-Efficiency Mode in the BIOS looks like an easy way to snag lower latency without buying a new kit or fiddling with timings yourself.

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