those people posting it a intel chipset are wrong, you can tell by the board, because the only 3x PCI-e boards are nvidia chipsets
Striker II Extreme is the name of the ASUS R.O.G. nForce 790i board. ASUS will not make two R.O.G. boards based on the exact same chipset.
This board has the exact same layout as R.O.G. Maximus Extreme, which also has three PCIe 16x slots. It's impossible for ASUS to adapt an Intel PCB to an NVIDIA chipset without making any noticeable changes
I've e-mailed the author, but I suspect he may be away at CeBIT.
//Andreas