G-Sync with GTX 690 does not work

When booting with GTX 690 and entering windows = (No input detected) which then generates a (Windows safe mode) option, which you HAVE to use to be able and browse internet and try to install driver / disable 1 GPU for entering the "Normal" Windows, but each time you have to install the drivers it requires a reboot, and the reboot for making the driver active, activates both GPU's on the GTX 690 = a continous loop of retries to get the card and screen to work toghter, but it aint happening.... 10x times i've tried, with no success whatsoever cause there's something very wrong with some driver.

I now use a GTX 680 borrowed from a friend, and it works without a problem, had to reinstall drivers and then reboot, and the screen and card worked perfectly with G-sync on 1st try.

Tog det på engelska då jag skrivit detta på ett flertal forum och haft ett helvete att försöka förstå mig på detta, men det är helt enkelt så att det inte funkar ännu pga drivisar vettefan hur de tänkt fixa detta.

Har prövat allt nu, inget jag kan göra längre, skickar tillbaka skärmen.