D3D9 graphics will definitely work fine (and flawlessly) on a newer advanced computer. The inline graphics client works fine, but D3D9 graphics is a leap above the inline graphics. Until you see them side-by-side you may not realize what you are missing.
As far as where to get it... https://www.orbiter-forum.com/showthread.php?t=18431
Installing it is pretty simple; unzip it into your Orbiter directory. The run Orbiter_NG, open the [modules] tab and select the D3D9 checkbox.
In order for some addons to work, you will need to make a symbolic link to the config folder. This is easily done by a mouse click. Open the [video] tab, click [advanced] and click on [create symbolic links]
You should be ready to go.
As far as where to get it... https://www.orbiter-forum.com/showthread.php?t=18431
Installing it is pretty simple; unzip it into your Orbiter directory. The run Orbiter_NG, open the [modules] tab and select the D3D9 checkbox.
In order for some addons to work, you will need to make a symbolic link to the config folder. This is easily done by a mouse click. Open the [video] tab, click [advanced] and click on [create symbolic links]
You should be ready to go.