Asus A8R32-MVP - Manual (Page 157)

A S U S A 8 R 3 2 - M V P D E L U X E A S U S A 8 R 3 2 - M V P D E L U X E A S U S A 8 R 3 2 - M V P D E L U X E A S U S A 8 R 3 2 - M V P D E L U X E A S U S A 8 R 3 2 - M V P D E L U X E 6 - 3 6 - 3 6 - 3 6 - 3 6 - 3
4. Connect one end of the external cable to the Master graphics card.
3. Insert the CrossFire™ Edition (Slave) graphics card into the black slot.
Make sure that the card is properly seated on the slot.