Thanks for the answer, just looked up MB specs.
"Slots
- 2 x PCI Express 3.0 x16 slots (PCIE2/PCIE4: single at x16 (PCIE2) / x8 (PCIE4), or dual at x8 (PCIE2) / x8 (PCIE4))
- 2 x PCI Express 2.0 x1 slots
- 2 x PCI slots
- Supports AMD Quad CrossFireX™ and CrossFireX™
- Supports NVIDIA® Quad SLI™ and SLI™
*PCIe Gen3 is supported on 3rd Generation of Intel® Core™ i5 and Core™ i7 CPUs."
So 2x PCI 2.0 and 2x PCI 3.0 will work but not old 2x PCI slots? Maybe I can start with 4x AMD quad or Nvidia Quad SLI.
Also I have 2500K and it says to use PCI express 3.0 I need 3rd gen intel processor. Is PCI 2.0 good enough?