Radiant Optimizer is a Windows desktop app that prepares your PC for gaming. Game Boost enables Game Mode, turns off built-in recording and requests best performance while plugged in. Free performance presets for CS2, Fortnite and VALORANT, live CPU/RAM/GPU monitoring with CSV export, and every changed setting or game file is backed up first with one-click recovery. Premium adds saved custom game profiles, CPU priority controls and PresentMon FPS/frame-time capture with an overlay.