What does this test check?
The GPU test inspects your graphics hardware through the WebGL API. It reports:
- GPU renderer — the specific graphics card or integrated GPU (e.g., NVIDIA GeForce, Intel UHD, Apple GPU).
- Vendor — the GPU manufacturer (NVIDIA, AMD, Intel, Qualcomm, Apple).
- WebGL version — whether WebGL 1.0 or WebGL 2.0 is supported.
- Max texture size — the largest texture the GPU can render, which affects image and 3D rendering quality.
- Extensions — additional GPU features like anisotropic filtering, instanced rendering, and more.
How the GPU test works
- The page creates a hidden WebGL context and queries the GPU for renderer and vendor information.
- It runs a series of rendering operations to measure fill rate, vertex throughput, and shader compilation speed.
- Results are displayed as a summary with your GPU model and performance characteristics.
Understanding the results
- High fill rate — the GPU can render many pixels per second, good for high-resolution gaming and video.
- Large max texture size — supports high-resolution textures (4K+), useful for photo editing and 3D work.
- WebGL 2.0 — required for advanced graphics features like instanced rendering and 3D textures.
- Limited extensions — older or integrated GPUs may lack some advanced rendering features.
Common GPU identifiers
The renderer string tells you exactly which GPU your browser is using:
- NVIDIA — GeForce, RTX, GTX series for desktops and laptops.
- AMD — Radeon series, common in gaming PCs and some laptops.
- Intel — UHD or Iris integrated graphics, found in most non-gaming laptops.
- Apple — Apple GPU (M1/M2/M3) on macOS and iOS devices.
- Qualcomm/ARM — Adreno or Mali GPUs on Android phones and tablets.