hi i have new gigabyte x99 gaming 5 with i7 5820k and corsair ddr4 8gb 2133 ad seasonic x760 gold series and asus 280x my pc run 100% when the pcie at gen2 , when i set it gen 3 or auto the pc keep crashing i have lastest bios update "f8" and lastest driver ,please help me i want my want my gpu run at gen 3
