Help with my PC and BIOS?

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I just changed some settings in the BIOS with the help of ChatGPT because my games were lagging and my RAM wasn’t being fully used. So they told me to adjust the BIOS, and I did. But it told me to set it to 3200 DDR4, and now there’s no video output.

I already removed the CMOS battery for 5 seconds and it still doesn’t show video. In some videos they say to remove it for up to 10 minutes. What should I do?