The biggest free FPS gain on any modern PC — and the first thing FrameCoach recommends in almost every game.
Upscalers render the game at a lower internal resolution, then reconstruct a full-resolution image using temporal data (previous frames) and, in DLSS and XeSS's case, machine learning. Done well, the result looks close to native while the GPU does 40–65% less pixel work. That's why the first item in nearly every FrameCoach settings list is the upscaler — no other single option buys as many frames for as little visual cost.
Use DLSS if your card supports it, FSR otherwise — that's the rule FrameCoach applies automatically based on your GPU.
Quality renders at ~67% of your resolution per axis, Balanced at ~58%, Performance at 50%. At 1440p and 4K, Quality mode is close to indistinguishable from native in normal play and typically adds 25–40% FPS. Performance mode is best reserved for 4K, where the input resolution is still high enough to reconstruct from.
At 1080p, aggressive modes reconstruct from very few pixels — Quality is usually fine, but Balanced/Performance get visibly soft and shimmery. In CPU-bound games (see the bottleneck guide) upscaling gains little, because rendering fewer pixels doesn't speed up the CPU — CS2 and Valorant players chasing 300+ FPS usually benefit more from CPU-side tuning. And in fast competitive shooters some players simply prefer native clarity; that's a legitimate trade the optimizer lets you override with live FPS feedback.