UserBenchmark - Free Online CPU, GPU & PC Stress Test
UserBenchmark is a free three-stage browser benchmark that measures sustained CPU throughput, adaptive GPU
pressure, and path-tracing convergence. No download or installation is required.
Features
- Path Tracing Mode — Real-time ray-traced global illumination with realistic soft shadows
for extreme GPU stress testing.
- Soft Shadow Rendering — PCSS shadows, ambient occlusion, and volumetric god rays for
intensive GPU workloads.
- Three-Stage Benchmark — sustained CPU workers, adaptive GPU raster pressure, and
sample-gated path tracing.
- Live Frame Metrics — Frame time, throughput, and performance degradation tracked in
real-time.
- Zero Installation — Runs entirely in your browser. No downloads, no admin rights, no
background processes.
How It Works
- Start Test — Click to begin. Nothing runs in the background.
- CPU Stress — All logical cores saturated with continuous math operations.
- GPU Pressure — an adaptive raster workload records its stable work ceiling and backend.
- Path Tracing — progressive rendering measures samples per second and consistency.
- View Results — inspect throughput, decay, stability, provenance, and evidence confidence.
Frequently Asked Questions
What is UserBenchmark and how does it work?
UserBenchmark measures a CPU and GPU under sustained browser workloads, then explains decay, consistency,
execution backend, and evidence confidence. Public comparisons are shown only with their clean sample count.
Do I need to download anything?
No — you can run UserBenchmark's tests directly in your browser without installing software.
Can stress testing damage my PC?
Not if done properly. However, sustained stress tests can reveal cooling, power, or stability issues in systems
with existing problems.
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