I agree with the above poster. Im not even sure if 3 way sli will work and if it does pretty much no modern games support it very well, not many support 2 way sli very well for that matter. And that mobo will run them pci 3.0 x8, pci 3.0 x8, and pci 2.0 x4. PCI 2.0 x4 will likely hold back the third card assuming you find a game that will utilize the third card and you get 3 way sli working on pascel.