Problems · How to check
Should I stress test my GPU?
Yes, in four situations: a new or second-hand graphics card, a laptop still inside its return window, after changing a driver, overclock or undervolt, and when games get slower the longer you play. In each of those a sustained load answers a question a quick benchmark cannot.
If the machine is new to you, stable, and games run the way you expect, there is little to learn. A stress test finds faults and limits; it does not make a healthy card any faster, and running one weekly for reassurance only adds heat.
First, notice when it happens
The causes, ranked
1. You bought a used or refurbished graphics card or laptop
most commonHow to confirm it
The card's history is unknown: it may have run hot for years, had its cooler reseated badly, or been tuned by a previous owner.
The fix
Run a sustained test inside the return window and watch whether the frame rate holds or fades. A card that holds is fine regardless of its past; one that fades early is worth a closer look or a return.
2. You changed a driver, an overclock or an undervolt
commonHow to confirm it
The change was made recently and you have not yet run a long, heavy load on the new settings.
The fix
Test before you trust it with a long gaming session. Tuning that only fails after twenty minutes will crash a game at the worst moment instead.
3. Games get slower the longer you play
commonHow to confirm it
The first few minutes are smooth and the frame rate drops later, with fans louder than they used to be.
The fix
A sustained test separates heat from the game itself. If the test fades the same way, look at cooling and airflow before blaming the game or the settings.
4. Nothing has changed and everything works
occasionalHow to confirm it
Stable card, known history, no symptoms.
The fix
Skip it. Test when something changes, not on a schedule.
What to do with the result
Keep the first result as a baseline. A sustained test is most useful as a comparison: the same machine before and after a driver change, the same card before and after cleaning, the same laptop new and a year later. Note the conditions with it: mains or battery, room temperature as you would describe it, and the browser you used.
Read the shape before the number. A curve that holds steady says the card sustains its speed in your conditions. A single step down early on is consistent with a designed boost window ending. A slow slide over the run is consistent with heat building up. None of these is a verdict by itself; each tells you what to check next, and the report says which.
Measure it instead of guessing
SystemCheck's GPU stage draws one fixed scene at 1600 by 900 and times every frame until the graphics chip has finished it, then reports frame rate, how steadily frames arrived, and how far the rate fell. A Deep run loops that pass three times and adds a soft-shadow stage and a combined CPU and GPU load, which is where heat-related decline shows.
What software cannot tell you here
- The card's temperature, fan speed or power draw. No browser exposes them, so heat shows only as frame rate lost over time.
- Whether artefacts are appearing. The test measures timing, not the picture, so watch the screen yourself during a heavy game.
Asked, in people’s own words
- Is it worth stress testing a new GPU?
- Yes, once, inside the return window. It is the cheapest time to discover a bad cooler mount or a card that cannot hold its speed, because you can still send it back.
- How often should I stress test my graphics card?
- Only when something changes: a new card, a driver update that causes trouble, new tuning, or a symptom that appears. There is no benefit to routine testing on a machine that is working.
- Does a stress test damage a GPU?
- Not a healthy one. Modern graphics cards slow themselves down and ultimately shut down before heat can harm them. A stress test exposes faults that already exist, such as a failing fan.
- Can I compare my result with someone else's?
- Only loosely. The same card in another machine has different cooling, power limits, drivers and browser, all of which move the result. The comparison that means most is your own machine against itself.