If you're still struggling, drop your internal render scale to 90% or 85% . It’s a huge FPS gain for a small hit to clarity.
Always use Fullscreen , never "Windowed" or "Borderless," to allow the OS to prioritize the game's GPU queue. 400 FPS BOOST on Any PC (Optimization Guide)
Search for "Choose a power plan" and select High Performance or Ultimate Performance . If you're still struggling, drop your internal render
Search for "Appearance and Performance of Windows" and select Adjust for best performance . This makes Windows look like Windows 98 but saves significant resources. If you're still struggling
Turn off "Focus Assist" and all system notifications to prevent background CPU spikes.