Sorry to resurrect old threads but this was the latest version of this problem I could find someone talking and the only one with anyone from the team responding. I am also having this issue, specifically only having 4:3 options available, and have followed all the following steps:
1. Edited the config file.
2. Updated the drivers.
3. Custom resolutions with Nvidia control panel.
4. Enabled various DSR options, (1.2x through 4x)
5. Logged in to retail client, logged in to character, changed resolutions all over the place. Changed to windowed mode, back to full screen, windowed and maximized, down to 800x600 and back up to 3440x1400. Rebooted system, opened vanilla client, selected no to the default driver set.
* In all of these cases I have rebooted the machine.
I know there is nothing someone can magically do to solve this problem, I just seem to see answers to it all over the place and I am wondering if anyone knows of a fix I have not yet tried.
Thanks.
Edit: Oh right -> 2x Nvidia 980TI (currently not in SLI), Acer Predator x34 Monitor
Edit 2: On the off chance it had something to do with SLI, I changed that and redid the steps above. No luck. I switched the monitor to the onboard graphics and it shows correct options, so clearly an nvidia issue; unfortunately the onboard gfx can hardly play the game.
Edit 3: Mostly solved! I had an older monitor in the other room that I plugged into the onboard hdmi port, and with that monitor plugged in and that port active wow can see a 1080p res option. No luck getting it to work at the odd 3440x1440 resolution but beggars cant be choosers.