a quick question

[Nick]

when I play games I use 90 fov etc if I go to a game like csgo or another game that does not support 90 fov. In the calculator set it to 90 anyway or the in game fov. one more thing in the config page if I put 90 fov and it says the actual fov (number) should I use that or the one in the config

[DPI Wizard]

You should make sure the Actual FOV is the same and that the config FOV matches what you have configured in the game, as games use many different ways of expressing FOV.