uax

Hello, I've bought Corsair Vengeance LPX, DDR4, 32 GB,2666MHz, CL16 (CMK32GX4M2A2666C16). It's running at 2133MHz as my motherboard BIOS shows. I know that enabling XMP should switch it to 2666MHz. But i'm not sure if it not void warranty. So i'm asking does enabling XMP profile void warranty and why it's not running at 2666MHz as it is declared in the specification?