In my Doom Eternal PC performance guide, you'll find out just how Low differs from its Ultra Nightmare settings, as well as how many extra frames you can expect to gain by tweaking its advanced video settings. Doom Eternal has finally ripped and torn its way onto PC, and to help make sure your rig doesn't explode into its own fiery hellscape, I've been putting the game through its paces to find out how to get the best performance from id Software's fast and furious shooter, and how to get the best settings if you find your graphics card's getting hot under the collar.