Here's why you should enable AMD EXPO/Intel XMP
Enabling XMP or EXPO is a no-brainer on your PC

Whether you're running DDR4 or DDR5 RAM on your PC, the importance of XMP/EXPO remains high. Put simply, AMD EXPO and Intel XMP are standards for memory profiles that communicate to your motherboard which settings it needs to use for your particular memory kit. The frequency, latency, voltage, and other information about your RAM are contained in these profiles that you need to enable in the BIOS/UEFI.