Free • Browser-based • No downloads
Put your GPU to the test
Stress My GPU is a free, browser-based GPU stress test and benchmark. Run demanding WebGL and WebGPU tests, watch real-time FPS, 1% lows and frame times, and get a plain-English verdict on your graphics card.
Your GPU
Detecting…
WebGLWebGPU
- Vendor
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- Renderer
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- WebGL 2
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- WebGPU
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- Max texture size
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- Detection
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Benchmark catalog
GPU stress tests and benchmarks
Choose a test to push your graphics card. Each benchmark stresses a different part of your GPU.
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3D Render
RenderingInstanced PBR-style scene with normal-mapped surfaces, dynamic lights and shadows.
Run Test — 3D Render -
Particle System
PhysicsGPU transform-feedback particle simulation with gravitational attractors and curl-noise motion.
Run Test — Particle System -
Shader Math
ShaderFragment-shader ALU workload: iterative trigonometry and procedural noise with a bounded loop count.
Run Test — Shader Math -
Texture / VRAM
MemoryProgressive texture allocation, upload, mipmapping and anisotropic sampling with safe memory caps.
Run Test — Texture / VRAM -
Volume Shader
ShaderAnimated Mandelbulb raymarching with configurable march and fractal iterations.
Run Test — Volume Shader -
Video Decode
VideoBrowser video pipeline workload: concurrent playback and texture upload. Not a pure hardware-decoder measurement.
Run Test — Video Decode -
WebGPU Compute
WebGPUWGSL compute shader performing tiled matrix multiplication. Requires WebGPU; no WebGL fallback is presented as WebGPU.
Run Test — WebGPU Compute -
Quick GPU Check
RenderingA 30-second health check using the 3D scene. Fast answer to "is my GPU doing roughly what it should?"
Run Test — Quick GPU Check -
Thermal Throttle Test
ShaderFive minutes of sustained load. The verdict compares the start and end of the run to expose thermal or power throttling.
Run Test — Thermal Throttle Test -
VRAM Capacity Probe
MemoryEscalates texture memory up to a safe budget and reports how much your browser could allocate before the cap.
Run Test — VRAM Capacity Probe -
Endurance Test
StressA 15-minute sustained run with the 3D scene. The verdict charts performance over time so you can see whether it settles or keeps falling as the GPU heats up.
Run Test — Endurance Test -
GPU Torture Test
StressEight stacked full-screen raymarching passes per frame, so even a fast GPU cannot simply sit at its refresh rate. Heavy: read the warning first.
Run Test — GPU Torture Test
Popular: GPU benchmark GPU stress test Graphics card test PC stress test CPU test GPU health check VRAM test 3DMark & FurMark alternatives
The SMG Verdict
Not just a number. A diagnosis.
Most benchmarks hand you a score and stop. We read the whole run: how much work the GPU did, how steady the frames were, whether performance held or faded, and how bad the worst moments felt.
- Power how much work it got through
- Steadiness how consistent frame times were
- Endurance whether it held from start to finish
- Pacing how evenly frames were delivered
- Spike control how well the worst frames were contained
Example result
Heat-Soaker · Capable
Strong at first, then it fades. A typical signature of thermal or power throttling.
Performance fell about 24% from start to end. Clean the heatsink, plug in the laptop and repeat the Thermal Throttle Test.
How it works
From click to verdict in three steps
Choose and configure
Pick a test, a duration, an intensity and a resolution scale. Defaults are safe for most devices.
Run the load
Your own GPU renders a demanding scene while we record every frame. A live HUD shows FPS and frame time. Press Esc to stop.
Read the verdict
Get your score, a five-axis profile, readiness estimates and what to do next. Compare with your previous run on the same device.
Tools
More than a stress test
GPU info and capabilities
Your GPU name, WebGL and WebGPU support, texture limits, threads and memory.
Refresh rate and pacing
Measure your real display rate, jitter and missed frames in five seconds.
Screen test
Fullscreen colour panels to spot dead pixels, backlight bleed and banding.
My results
Your last 20 runs, saved privately in this browser only.
Guides
Learn what the numbers mean
WebGL, WebGL2 and WebGPU: what your browser actually supports
The differences between the three browser graphics APIs and how to check what you have.
Thermal throttling: why your GPU slows down and how to fix it
How to recognise throttling in a test, what causes it and the practical fixes in order of effort.
FPS, 1% lows and frame time: how to read your results
Why average FPS is not enough and what 1% and 0.1% lows reveal about stutter.
How to run a GPU stress test safely
A short checklist for stressing a graphics card without risking stability, plus how to choose duration and intensity.
FAQ
Questions people ask before running a stress test
Is it safe for my GPU?
Browser tests are far lighter than dedicated tools like FurMark, and your browser limits what a web page can do. A healthy, well-cooled GPU will handle them. Still, stop if fans sound extreme, you see artefacts or the device gets very hot. Stop at any time with Esc.
Does anything get uploaded?
No. Detection, scoring, the verdict and your history all happen in your browser. You can optionally submit a result anonymously; the exact fields are listed beside the button.
Why does it show a different GPU name than I expect?
Browsers may mask or generalise GPU names for privacy, and laptops often switch between integrated and dedicated graphics. We show what the browser reports and tell you how confident that is.
Can I compare my score with 3DMark or FurMark?
No. The Stress My GPU Score is specific to this site. It is useful for comparing your own runs over time, not for comparing with other tools.
What is a good result?
Look at the verdict, not just the score. A steady run that holds its performance and has small gaps between average FPS and 1% lows is better than a high but erratic one.
My result is capped at 60 or 144 FPS. Why?
Browsers lock animation to your display refresh rate. If your result sits at that rate, the GPU has headroom. Raise the intensity or resolution scale to find its ceiling.