Usually if its fullscreen and the issue is u cant see much of the game just some of it in top left corner, just go to dx and set display to be set by app then save then should work, if its a diff issue then dunno.
Also if the game is showing ok but just small and windowed and stuck at the top left, try just pressing alt and enter to switch it to fullscreen mode?
I noticed u said u used DGvoodoo in a post above, dont use that.
Also check nvidia drivers and go through the menu till u find gpu scaling, see if its on or off and is it set to full frame or something.
https://imagegod.b-cdn.net/wp-content/uploads/2021/08/1629680732_211_What-is-GPU-Scaling-How-to-Turn-it-On-or.png (if its on display try gpu scaling or vice versa, u can always change it back if it doesnt work.)
Also your not using nvidias image scaler are you?
[url=https://nvidia.custhelp.com/app/answers/detail/a_id/5280/~/how-to-enable-nvidia-image-scaling]https://nvidia.custhelp.com/app/answers/detail/a_id/5280/~/how-to-enable-nvidia-image-scaling[/url] the stuff thats discussing?