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Can't disable CSM / Gigabyte X99-UD4

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  • Can't disable CSM / Gigabyte X99-UD4

    Hello everybody,

    I recently upgraded to a new RTX 3070 and noticed a few more beeping sounds at the startup of the system. After a quick search, I learned this is probably due to CSM in the BIOS.
    This turned out to be true, so I made sure I have Windows 10 in GPT and disabled CSM in the BIOS.
    However, after saving settings, the system will do a cold reboot and set the setting back to "Enabled".

    I thought, maybe the BIOS on my card doesn't support UEFI-GOP for some reason, but I couldn't disable CSM on my old 1070 as well.  

    Can you help me with this?

    Rest of my system:
    Gigabyte X99-UD4
    4 x 4 GB DDR4 2133 MHz
    PNY RTX 3070
    Win 10 64 Bit