So I was testing some more found the following. Gsync is verified to be enabled because I am using the nvidia option to show the gsync enabled overlay when playing a game and its on.
1. Running my 144Hz monitor with Gsync enabled (the monitor is set at 144 Hz in the system settings) will run the game at an avg of 140FPS or so. GPU use is 100%.
The in game frame rate limiter when the monitor is set to run at 144Hz gives the options for 1/1 - 144fps or 1/2 -72fps or 1/4 which is 36fps.
Using the in game frame rate limiter does not work in full screen mode. Game will still run at those high FPS tapping out the GPU.
Using the frame rate limiter in windowed mode totally breaks the game. It will cut FPS down to about 17 FPS.
2. Setting my monitor to 120Hz with Gysnc enabled in the system settings does the same thing
In game frame rate taps out at 120FPS. GPU is at 100% use.
The in game frame rate limiter gives the options for 1/1 which is 120FPS or 1/2 which is 60 fps or 1/4 which is 30 fps.
In full screen mode once again using the FPS limiter does not work at all. Setting it to any choice above in full screen mode the FPS still tap out at 120 fps. Causing 100% GPU use.
Trying to limit them again in windows mode breaks the game and causes FPS to drop to 15 or so FPS.
3. Setting my monitor to 60Hz in the system settings and Gsync enabled will run the game at a max of 60FPS. GPU use is at about 60 to 65%.
The in game frame rate limiter gives the choices of 1/1 -60 or 1/2 - 30 or 1/4 - 15
Not that I would want to go anywhere below 60 FPS I wanted to try the frame rate limiters as well here were my results.
IN full screen mode once again the frame limiter does nothing at 1/2 or 1/4. Game stays at 60 fps.
In windowed mode the limiters tank the game way below what it should be, same as the above other test.
Setting it to 1/2 which would be 30 FPS the game tanks to about 20 FPS.
Setting it to 1/4 which would be 15 FPS the game drops to 7 or so FPS.
There is something broken somewhere with Nvidia and FFXIV not playing nice together. Especially with Gsync on.
As I said above I have none of these issues when playing another MMO like world of warcraft or black desert online. All of their in game frame rate limiters work just fine with no issues. Maybe not the best examples but they are the closest to FFXIV I can think of as far as being MMOs.
Also I dont have 100% GPU use issues with other MMOS as well. Also no my CPU cores arent tapped out either they arent overloaded at all. They eat up the other games just fine. The CPU and GPU in my other games are working happily together.
This ONLY happens with FFXIV.
There has to be something related to nvidias drivers/Gsync and how its implemented in FFXIV.