Ray Tracing Overdrive: What Path Tracing Actually Does to a Frame
RT Overdrive replaces Cyberpunk’s hybrid lighting with full path tracing — every pixel’s light is traced through the scene with sampled bounces, denoised per frame. It’s a 3.4× multiplier over native Ultra in our model, which is why even an RTX 5090 needs upscaling to make it fluid at 4K.
- BVH traversal cost scales with resolution — path tracing at 4K is ~2.7× the 1080p workload, before denoising.
- Denoiser quality depends on sample count, which scales with frame budget: low FPS compounds into blur.
- RT: Overdrive also raises VRAM pressure by 2–3GB — 8GB cards swap residency and stutter.
- RT Ultra (the tier below Overdrive) keeps hybrid RT reflections/GI at a 2.4× multiplier — often the sweet spot.
Pro tip: if your RT Ultra native average lands under ~45 FPS, add DLSS Quality before touching Frame Generation — FG multiplies a stuttery base into a stuttery slideshow.