It says right on the support page bud.Support for 2-Way AMD CrossFireX/NVIDIA SLI technology. Expansion Slots: 1 x PCI Express x16 slot, running at x16. 1 x PCI Express x16 slot, running at x8. 1 x PCI Express x16 slot, running at x4. 1 x PCI Express x1 slots.
But why i really ask is because i got a sli with the motherboard and really i dont know the full name can only see this on my bios Z77-D3H because i have buy a finish build computer.