These profiles may provide different levels of overclocking, which can all be checked via the BIOS. XMP profiles can be accessed from within the BIOS on supported motherboards. XMP profiles essentially allow high-performance RAM, which run above industry DDR specifications, to be appropriately set up for your system. It also corrects for the extra voltage required which provides a stable overclock with the click of a button. XMP is an extension of SPD which provides higher frequencies and tighter timings for your memory to run at. Your BIOS will use a small chip on your RAM modules called an SPD (serial presence detect) chip to set memory timing and frequencies properly. Your computer needs to know the model of your RAM as well as which timings and frequency to set. Part of this process includes automatically configuring installed hardware, including your memory. When you power on your computer, it conducts a power-on self-test.
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