Installation insructions:

Step 1. Find this line in your system.xml and copy it:
<videoCardDescription>YOUR GPU HERE<videoCardDescription>

Documents\Rockstar Games\Red Dead Redemption 2\Settings is my file path for my system.xml depending on what version you have it could be somewhere else.

Step 2. Find this line in my system.xml and paste yours over it:
<videoCardDescription>NVIDIA NVIDIA GeForce RTX 3070</videoCardDescription>

Step 3. Replace your system.xml with mine. Done!

To uninstall, restore default settings in game at any time.

WARNING: Pushing your graphics to the limit will cause stability issues with mods like Instant Travel