On your motherboard the 2 Intel SATA 6Gb/s ports are named SATA6G_1 & SATA6G_2.
See page 2-2 of your motherboard manual for the location of the ports.
Make sure the port your SSD is connected to is in AHCI mode when installing Windows.
I am connected to one of those two ports. However I am not sure if it is in AHCI mode. How do I check/change this? Also, if I find it's in the wrong mode, do I need to re-install my OS?!?!