The sapphire logo should indeed be on, that is purely a power issue! Have you tired the card in all PCI-e slots on your motherboard?
I have an AsRock WS (Extreme9) with a few missing features, Wifi and others. I love this motherboard. I went from the MSI Z77 MPower. Coulndt be happier. But does sound like you have issues with the motherboard. The Extreme 11, is drolling, but its a pricy thing! Gonna run you almost the same as another Toxic card. Most people just get the Asus Rampage x79.
Do try the card in other slots.