How i put pci-e at 3.0?

My Pc:
Corsair AX1200W
i7 3930K C2 @ 4,6 HT ON 1,36v
Corsair H80
Asus Rampage IV Extreme
16Gbs GSKILL 17000 RipjawsZ (2133mhz) 9-11-10-28 1.65v
SLI 680GTX (MSI+ASUS)
X-Fi Titanium Pro Fatal1ty
SSD OCZ Vertex 3 120gbs
HDD Velociraptor 150gbs
HDD Maxtor 240gbs
ASUS VG236H

My pci-e are 3.0, but gpu-z say me that i have 2.0.


Sorry for my english. Thanks