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Ray tracing is a rendering technique that simulates how light travels and bounces in a scene, producing more realistic reflections, shadows and lighting than traditional shortcuts, at the cost of much heavier graphics workloads. On a gaming PC it is optional: you can switch it on for visual quality or off for higher frame rates.
What Ray Tracing Actually Does
Traditional game graphics use rasterization, which turns 3D models into pixels quickly and fakes lighting with tricks such as shadow maps, baked light and screen-space reflections. These tricks are efficient but have known weaknesses: reflections vanish when the object leaves the screen, and shadows can look flat or blocky.
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Ray Tracing: The Rest Of Your Life (Ray Tracing Minibooks Book 3)
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View on AmazonRay tracing instead traces rays of light through the scene and calculates where they hit surfaces. Games typically apply it to specific effects:
- Reflections that show objects off screen and match the real surroundings.
- Shadows with realistic soft edges.
- Ambient occlusion, the darkening in corners and creases.
- Global illumination, where light bounces off surfaces and tints nearby objects.
Path tracing is the most demanding form, simulating many light paths for most of the scene. Titles such as Cyberpunk 2077 and Alan Wake 2 offer it as a top-end option.
Why It Is So Demanding
Each ray must be tested against the scene geometry, which is a huge number of calculations per frame. Modern GPUs include dedicated ray tracing hardware. NVIDIA GeForce RTX cards use RT cores, and AMD Radeon cards include ray accelerators. Even with that hardware, turning ray tracing on often lowers frame rates noticeably, which is why it is usually combined with upscaling.
Hardware and Upscaling
NVIDIA’s RTX 50 series, which uses the Blackwell architecture, supports DLSS 4. NVIDIA describes DLSS 4 as including Multi Frame Generation, which can generate up to three extra frames per rendered frame on RTX 50 series cards, along with improved Super Resolution and Ray Reconstruction. Ray Reconstruction is aimed at cleaning up noise in ray-traced lighting.
AMD’s Radeon RX 9000 series, based on RDNA 4, improved ray tracing over its predecessors and supports FSR 4 upscaling. Buying guides in 2026 generally report that NVIDIA keeps a lead in heavy ray tracing and path tracing, while AMD is often positioned as strong on value and video memory. One retailer comparison, for example, reports Alan Wake 2 with path tracing running noticeably faster on a GeForce RTX 5070 than on a Radeon RX 9070 XT at 1440p. Treat such numbers as approximate, since results vary by game version, driver and settings.
Quick Reference Table
| Setting or term | What it does | Performance impact |
|---|---|---|
| RT reflections | Accurate reflections of the scene | Moderate to high |
| RT shadows | Realistic soft shadows | Moderate |
| RT global illumination | Light bounce and color bleed | High |
| Path tracing | Full light simulation for most effects | Very high, needs upscaling |
| DLSS, FSR, XeSS | Upscale from a lower internal resolution | Recovers frame rate |
| Frame generation | Inserts extra generated frames | Raises displayed frame rate, adds latency |
| Ray Reconstruction | AI denoising of ray-traced light | Improves image quality |
How to Check and Set Ray Tracing on Your PC
- Confirm your GPU supports it. Look up your graphics card on the maker’s specification page. Recent GeForce RTX and Radeon RX 6000 series and newer cards, plus Intel Arc cards, support hardware ray tracing.
- Update the graphics driver from NVIDIA, AMD or Intel.
- Open the game’s graphics settings. Look for options named Ray Tracing, RT Reflections, RT Shadows or Path Tracing. Names differ by game.
- Enable an upscaler such as DLSS, FSR or XeSS alongside ray tracing.
- Use the in-game benchmark if there is one, or watch frame rate with an overlay, and compare with ray tracing on and off.
- Adjust. If frame rates drop too far, lower the ray tracing quality level or the render resolution before disabling it.
Windows 11 and DirectX 12 are the standard environment for ray tracing in games, and many titles use DirectX Raytracing, often shortened to DXR. A few games use Vulkan ray tracing instead.
Common Misconceptions
- “Ray tracing always looks dramatically better.” In some scenes the difference is subtle, and good rasterized lighting can be convincing. Gains are largest in scenes with shiny surfaces and complex indirect light.
- “Only NVIDIA cards can do it.” AMD and Intel GPUs support hardware ray tracing too, though performance differs.
- “Frame generation gives real performance.” It raises displayed frames but does not reduce the latency the way real frames do, and some players feel the difference.
- “Ray tracing needs the most expensive card.” Lighter effects run acceptably on mid-range cards with upscaling; path tracing is the demanding exception.
- “More VRAM is irrelevant.” Ray tracing adds memory overhead, so cards with little video memory can struggle at high settings.
When to Care and When to Ignore It
Care about ray tracing if you play single-player, visually driven games, own a monitor where you can appreciate image quality, and your GPU can hold a steady frame rate with it enabled. Ignore it, or use only a light setting, if you play competitive shooters where high frame rates and low latency matter more than lighting, or if your GPU already struggles at your target resolution.
When shopping, weigh your own game list. If you mostly play esports titles that offer no ray tracing, pay more attention to raw rasterization performance and monitor refresh rate. If you want to play path-traced showcase games, read independent benchmarks for those specific titles. Keep your system cooled, since ray tracing pushes the GPU hard, and follow the card maker’s guidance on power connectors and cables. If you notice heat damage or a melted connector, stop using the card and contact the maker.
Tuning Tips for Smoother Frame Rates
If ray tracing makes a game feel sluggish, change one setting at a time. Lower the ray tracing quality preset first, then the render resolution through the upscaler, then shadow and volumetric settings that add load alongside it. Keep the driver current and close overlays that use GPU resources. Watch temperatures and fan noise, because sustained ray tracing loads push power use up. Make sure the graphics card’s power cables are fully seated, and for the 12VHPWR or 12V-2×6 connector follow the card and power supply maker’s guidance, stopping use if you see heat damage. Contact the maker or a technician if the PC crashes or shuts down under load.
Frequently Asked Questions
Does ray tracing lower FPS?
Yes, usually by a meaningful amount, depending on the effect and game. Upscaling and frame generation are commonly used to recover performance.
Do I need an RTX card for ray tracing?
No. Radeon RX 6000 series and newer, and Intel Arc cards, also support hardware ray tracing. NVIDIA RTX cards generally lead in heavy ray tracing workloads.
What is the difference between ray tracing and path tracing?
Ray tracing in games usually applies to selected effects such as reflections or shadows. Path tracing simulates light for most of the scene and is far more demanding.
Is ray tracing worth it on a mid-range GPU?
It can be, at lighter settings with upscaling. Try a single effect, such as shadows or reflections, and compare frame rates with it off.
Does ray tracing need a special monitor?
No. Any monitor works. HDR displays and good contrast show lighting differences more clearly, but they are not required.
