Most in most situations the option can be enabled in the "integrated peripherals" on EVGA motherboard. Be sure to review the motherboard manual where the specific location can be.

This will be the same menu where you can enable your RAID controllers

for EVGA manuals, please follow this link: 
https://www.evga.com/support/manuals/

Note: If you are using a intel based motherboard, selecting RAID will also enable AHCI as well.