hello guys recently i bought a i7 8700 (non k version) with the z370 prime-a board and a 16gb corsair vegeance 3000mhz kit .
my cuestion is when i activate the xmp profile of the ram the bckl goes from 100 to 102.5 or 103.5 i dont remember well , what makes a mild oc on my cpu 4.4 all core. Is this normal ? does all the xmp's modify the bckl speed ? its safe ?

PD: sorry for my broken english im from argentina