Stress My GPU
Push your graphics processor under a sustained, configurable browser-based rendering workload and monitor real-time frame performance, pacing, and stability — with honest, measured metrics only.
Sustained GPU rendering workloads increase device power consumption, cooling fan noise, and thermal dissipation. Ensure intake vents are unobstructed. If your system becomes excessively hot or unstable, click Stop Stress Test at any time.
Detecting active WebGL2 context and hardware capabilities...
GPU Stress Test Ready
Execute sustained ray-marched geometry, high-frequency math, and multi-pass post-processing to verify GPU stability.
Workload Settings
Real WebGL2 ShadersReal-Time Hardware Telemetry
Framerate (FPS) Over Time
GPU rendering frequency during sustained stress
Frame Time (ms) Latency
Draw call computation latency per frame
Sustained-Load Window Comparison
Compares average framerate across distinct test windows to detect sustained throttling or degradation.
GPU Stress Test Results
Calculated from actual WebGL2 frame delivery timestamps.
How GPU Stress Testing Works
Understanding the sustained execution pipeline that exercises hardware arithmetic, fillrate, and frame pacing.
Continuous Shader Stress
Unlike short benchmarks that only measure peak burst speed, a GPU stress test executes non-stop mathematical transformations, ray marching, and texture filtering to evaluate sustained hardware performance under prolonged graphics load.
High-Frequency Math Operations
The WebGL2 fragment shader calculates multi-octave 3D Fractional Brownian Motion (fBm), dynamic domain warping, trigonometric lighting vectors, and analytical distance functions for every on-screen pixel, saturating GPU shader execution units.
Multi-Pass Framebuffer Pipelines
The engine renders geometry into an offscreen high-precision Framebuffer Object (FBO) before executing secondary post-processing passes (chromatic dispersion and bloom blur), continuously cycling GPU VRAM memory bandwidth.
Frame Pacing & Jitter Monitoring
Measures discrete draw call intervals in milliseconds via performance.now(). By tracking consecutive frame variance (jitter) and 1% low framerate drops, the test detects micro-stutters and graphics driver stalls.
Sustained Window Analysis
The test partitions recorded frame times into Initial (0-20%), Mid (40-60%), and Final (80-100%) execution windows to objectively quantify performance changes over time as hardware runs hot.
Bounded Memory & Safe Defaults
All shaders and buffer allocations strictly adhere to device limits queried via WebGL2, evaluating GPU stability thoroughly without triggering operating system driver crashes or unsafe resource exhaustion.
What This Test Can and Cannot Measure
Clear technical distinction between measurable rendering telemetry and restricted browser hardware sensors.
What This Test CAN Measure
- ✓Real-time FPS and average rendering throughput under sustained load
- ✓Exact frame delivery time (milliseconds) per rendered frame
- ✓1% Low FPS to highlight micro-stutters and driver hitches
- ✓Frame-time jitter and pacing consistency across minutes of execution
- ✓Sustained performance degradation between initial and final test windows
- ✓WebGL2 context stability, compilation speed, and driver recovery
What This Test CANNOT Measure (Browser Sandbox)
- ✗Physical GPU core temperature (°C) — Protected by browser security
- ✗Hardware GPU utilization percentage (e.g. 99% load) — No browser API
- ✗Total graphics board power consumption (Watts) — Inaccessible to web pages
- ✗Current physical VRAM allocation (MB) — Hidden from JavaScript APIs
- ✗GPU core and memory clock frequencies (MHz) — Blocked for privacy
- ✗Thermal sensor diode readings — Requires native desktop utilities
Frequently Asked Questions
Common technical questions regarding GPU stress testing, thermal behavior, and browser limits.
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WebGPU Fuzzing Test
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3D Rendering Performance Test
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GPU Guide
Complete educational guide to browser GPU testing, WebGL/WebGPU benchmarks, and diagnostics.