Hi guys, first of sorry my bad english, Ican't enable SLI Option in Nvidia control panel , ım using 2xgtx 680, and my motherboard is P8Z77-V Asus , when im using sli bridge and restart my computer, sli option is missing at nvidia control panel, when ı off sli bridge and restart pc, boom sli option is there at control panel, but this time, nvidia control panel say to me , please use sli bridge, my sli bridge is new and i think not broken , ı dont understand this issue pls help me guys, sorry for my bad english again,