GPU Health Check
This GPU health check looks for the usual signs of a struggling graphics card: performance that fades, frames that hitch, crashes and unstable memory. It is a practical first diagnostic, not a hardware repair test.
Thermal Throttle Test
This canvas shows the animated graphics workload used to stress the GPU. It is decorative; results are listed in the metrics below.
- FPS
- –
- 1% LOW
- –
- FRAME TIME
- –
- SCORE
- –
- TIME
- 0:00
- LOAD
- –
- ERRORS
- 0
Before you start
GPU stress tests can significantly increase GPU load, temperature, power draw and fan speed.
Stop the test if your system becomes unstable, overheats, crashes or behaves unexpectedly. Do not run extreme tests on hardware with known cooling problems. This website cannot guarantee hardware safety.
This is a deliberately punishing test. It can push your GPU to its thermal and power limits for minutes.
- Laptops: plug in the charger and make sure the vents are clear.
- Make sure your GPU is cooled properly. Do not run this with known fan or cooling problems.
- Save your work and close other important tabs. A weak or overheated GPU can make the screen flicker or the graphics driver reset, which may close apps.
- You can stop at any time with the Stop button or the Escape key. The test also stops itself if frames take more than two seconds.
Long run: this test keeps the GPU busy for five minutes or more, so your computer will get warm. Laptops should be plugged in. You can stop at any time with the Stop button.
About this tool
This check runs the Thermal Throttle Test and reads the result for signs of trouble: a slowdown over time, hitching, or unstable frame delivery. It does not measure temperatures or inspect the card itself, but it shows how the GPU behaves under sustained load.
How to read the results
Finding stutter and hitching
Compare the average FPS with the 1% and 0.1% lows. A big gap means stutter even when the average looks fine. Close background apps, update drivers and try again.
Signs of a failing card
- Artefacts such as coloured dots or lines.
- Black screens or driver crashes under load.
- Temperatures that rise fast and stay high.
- Fans at full speed while idle.
If you see these, stop testing and have the card checked.
How to check GPU health
- Run the Thermal Throttle Test above for at least 2 minutes.
- Read the Endurance axis. A drop of more than 20% suggests thermal or power throttling.
- Read Spike control. Frequent slow frames mean hitching, often from drivers, background apps or memory pressure.
- Run the VRAM test.
Keep a record
Checking every few months, or after a driver update, catches problems early. Your runs are saved in My Results so you can compare.
Frequently asked questions
How do I test the health of my GPU?
Run a sustained stress test, then review stability, endurance and spike control in the verdict.
Can a browser detect a bad GPU?
It can reveal throttling, hitching and crashes, but only a full hardware diagnostic can confirm a fault.
How often should I check my GPU?
Every few months, and after a driver update, a cleaning or a cooling change. Your runs are saved on your device so you can compare them.
The test passed. Is my GPU healthy?
It is a good sign, not a guarantee. A browser cannot see temperatures, memory errors or fan health, so pair it with a monitoring tool if you suspect a fault.
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