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As mentioned in the BIOS section, the board suffers from not being able to reduce CPU VCore in idle mode when the CPU is overclocked, but the VRM is improved compared to any other ASUS board we tested so far. It's able to come close to DFI, but it failed when high overclocks were applied, because it needs +0.05V Vcore more than DFI to achive stable 3666MHz.
Please mention other configurations may yield other results.
Compared to DFI the latest ASUS board in our labs did exceptionally well, when not highly overclocked and comes close to the best results so far. Sadly, the VRM was not stable while overclocking to 3666MHz.