ASRock z97 Extreme 9 -
http://www.asrock.com/mb/Intel/Z97%20Extreme9/?cat=Specifications
" 4 x PCI Express 3.0 x16 Slots (PCIE1/PCIE2/PCIE4/PCIE5: single at x16 (PCIE1); dual at x16 (PCIE1) / x16 (PCIE4); triple at x8 (PCIE1) / x8 (PCIE2) / x16 (PCIE4); quad at x8 (PCIE1) / x8 (PCIE2) / x8 (PCIE4) / x8 (PCIE5))
- 1 x PCI Express 2.0 x16 slot (PCIE3: x2 mode)
- 1 x mini-PCI Express Slot
- PLX PEX 8747 embedded
- Supports AMD Quad CrossFireX™, 4-Way CrossFireX™, 3-Way CrossFireX™ and CrossFireX™
- Supports NVIDIA® Quad SLI™, 4-Way SLI™, 3-Way SLI™ and SLI™
- 15μ Gold Contact in VGA PCIe Slot (PCIE1 and PCIE4)"