What the GPU test shows
- GPU (renderer): the graphics chip the browser draws with. On laptops with two GPUs this is often the built-in one, because browsers save power by default.
- WebGL and WebGPU: the graphics features your browser can use. If WebGL is missing, hardware acceleration is probably off.
- Stress test: a shader that does heavy maths on every pixel. The frame rate shows how much work the GPU can do, and whether it slows down as it heats up.
How to read the stress test
Run the test at Medium first. If the average stays close to your screen refresh rate, the GPU has headroom. Then try Heavy or Extreme. A frame rate that holds steady for the full run means cooling and power are fine. A rate that starts high and then drops points to thermal throttling: the chip slows itself down to stay cool. Clean the fans, check that laptop vents are free, and use a power profile set to performance.
This is a browser test, so it cannot load the GPU as hard as tools like FurMark or 3DMark, and scores are not comparable with them. Use it as a quick health check.
Browser using the wrong GPU?
- Hardware acceleration off: in Chrome and Edge open Settings, System, and turn on Use graphics acceleration when available. Restart the browser.
- Laptop with two GPUs (Windows): open Settings, System, Display, Graphics, add your browser and set it to High performance.
- Shows "SwiftShader" or "llvmpipe": the browser draws with the CPU. Update your graphics driver and turn on acceleration.
Frequently asked questions
Short answers to the questions people ask most about this test.
How do I check which GPU I have?
Open this page. The GPU (renderer) line shows the graphics chip the browser uses. On Windows, Task Manager under Performance also lists every GPU.
Is the GPU stress test safe?
Yes. It runs like a demanding game. Your GPU protects itself from overheating by slowing down. Stop the test if the computer gets unusually hot or noisy.
Why is my GPU name hidden or generic?
Some browsers, like Safari and Firefox with privacy settings, report a generic name to make tracking harder.