The Z390 Taichi overclocked our CPU to 5.2GHz and went up to XMP with ease. The voltage we set was 1.33v, and it seemed to increase the LLC level to the second highest level automatically. We also increased maximum current to 255A, which is the maximum for the CPU. There are also LN2 OC presets available in the UEFI, and some of the voltages in the voltage menu are labeled as cold bug killers.
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United States: The ASRock Motherboard (Z390 Taichi) retails for $202.99 at Amazon.