First off, why did you post your topic in NON-ROG Asus Notebooks and Tablets? I think you would get much faster response if you posted in G Series Notebook 😉

Have you tried to do a vBIOS update to see if that changes your issue?
Also you could check out this site
[Note: you need to flash your BIOS to 211 or newer to get full support of the vBIOS update]
BIOS update guide tutorial
Or you can follow these steps:

JRd1st wrote:

The Safer Method to Flash a System BIOS

1. Format a USB drive to FAT32 format.
2. Download the new BIOS and unzip it to the USB drive.
3. Remove USB drive after you're certain the file transfer is complete.
4. Restart your notebook and while the ASUS logo is on the screen press F2 or del a few times to enter the BIOS setup.
5. Find the Easy Flash Utility and insert the USB drive. Tell Easy flash where your BIOS file is then follow directions explicitely!!!
6. When your notebook restarts, enter the BIOS Setup utility again and select "Load Optimized Defaults" (I think it's f9 )
7. Save and Exit, then continue into Windows.

If you still got the same issue after a vBIOS update, then you got a bad grapich card, I would say.