I would return the laptop and buy a different brand! that's the only logical thing to do
Can you be a little more specific please. Is this happening on all games online/offline?
If you want to troubleshoot, then do this:
If you are using the ASUS drivers for your graphics card, then try drivers 344.75 they are the best I've benchmarked with all of them the latest ones suck.
If you are not using the ASUS Drivers and are actually using the latest nVIDIA ones, then roll back to the ASUS version of the nVIDIA Driver that is under your drivers download page for your particular model as that has been supposedly to work properly with your laptop.
Always ensure you select custom install, then choose Clean Installation
344.75 and 345.2 are the last drivers that u can OC and is the most stable