Out of the box, Red Alert 3 is hardcoded to run at 30 frames per second. While this was acceptable for the hardware of 2008, on today's 144Hz or 240Hz gaming monitors, the game feels sluggish. The cursor feels floaty, unit movement looks stuttery, and panning the camera results in a jarring blur. It creates a disconnect between the player's inputs and the on-screen action.
: It offers significantly better mouse responsiveness and smoother panning, making it feel like a modern RTS. The "Lossless Scaling" Alternative
Once installed, you need to verify it worked.