How to test a laptop GPU after a major OS upgrade

After a major operating system upgrade, your laptop may feel slower in games or creative apps, or the screen may behave differently. A quick graphics check can help you see whether browser-based GPU performance is consistent and whether basic troubleshooting is worth trying.

The Graphics Test runs a graphics workload in your browser. It measures shading power and fill rate at 1080p and gives you a score out of 100. It cannot confirm that every game or graphics app is working properly, but it gives you a useful first check.

Run the Graphics Test

1. Plug the laptop into power, place it on a firm surface, and close games, video editors, and other demanding apps.
2. Open the Graphics Test in the browser you normally use. Let the page finish loading before you start the test.
3. Run the test and wait for it to finish. Note the score and any shading or fill rate results that it displays.
4. For a useful comparison, run it once more under the same conditions. If you saved a score from before the OS upgrade, compare that too, but only if the laptop, browser, power state, and test conditions were similar.

A browser test can run differently depending on the browser and its graphics settings. Keep those the same when comparing results. A score from a different laptop or a different test setup is not a reliable target.

What the result means

The score is similar across both runs

Consistent results suggest the browser can run this graphics workload steadily. If a game or graphics app still performs poorly, the problem may be specific to that app, its settings, or the graphics driver it uses. Test the actual app as well before deciding the GPU is at fault.

The score is much lower than your earlier result

First check whether you changed browsers, ran the test on battery, or had other apps open. The OS upgrade may also have changed power or browser graphics settings, or installed a driver that performs differently. A lower browser score alone does not prove that the GPU is damaged.

The score drops on the second run

The laptop may be warming up or reducing its speed to control heat. Make sure its vents are clear and it is not resting on a blanket or soft surface. If the score keeps falling during ordinary use, check whether the laptop is unusually hot or its fans are blocked.

The score looks fine, but a game still has problems

The test checks a browser workload, not every feature a game needs. Games can rely on different graphics APIs, drivers, memory, or settings. Check the game itself and its graphics options. A browser score also cannot tell you exactly how much video memory your GPU has. See what a browser graphics score cannot tell you about VRAM.

How to fix a lower score or graphics slowdown

1. Restart the laptop and close demanding apps. A restart clears temporary problems left by an upgrade or a driver update. Close games, video calls, and editing software before testing again.
2. Check power and temperature. On Windows 11, open Settings › System › Power & battery › Power mode and choose a performance-oriented mode if one is available. On macOS, open System Settings › Battery and turn off Low Power Mode if it is enabled. Keep the laptop plugged in and leave its vents unobstructed while testing.
3. Check browser graphics acceleration. In Chrome, open Settings › System and look for Use graphics acceleration when available. In Edge, look under Settings › System and performance for the same setting. If you change it, restart the browser and run the test again. Safari does not offer the same general browser setting.
4. Check which GPU the browser uses. Some laptops have both integrated graphics and a separate GPU. In Windows 11, open Settings › System › Display › Graphics, select the browser, and choose Options if it is available. You can test High performance on a laptop with a separate GPU, then compare the result. This setting may use more battery. macOS manages graphics selection automatically on supported laptops, so there may not be a matching control.
5. Install the right graphics updates. On Windows 11, check Settings › Windows Update and the laptop maker's support page for a graphics driver meant for your model. Some laptops need a driver supplied by their manufacturer rather than a generic one. On macOS, graphics drivers are included with the operating system, so check System Settings › General › Software Update.
6. Test the app that has the problem. After changing a setting or driver, open the game or graphics app that was slow and check it under the same conditions as before. If only one app is affected, update that app and check its graphics settings before changing more system options.

When the GPU may need service

Browser test results are not enough to diagnose a hardware fault. Look for problems that also appear outside the test, such as repeated visual artifacts, crashes across several graphics apps, or a laptop that shuts down under ordinary graphics work. If these began immediately after the OS upgrade, software compatibility is still a possibility.

Install updates from the laptop maker and retest. If the same symptoms continue in multiple apps after software checks, contact the laptop maker or a repair shop. A laptop with a separate graphics chip may require professional service rather than a simple replaceable part.

Why an OS upgrade can change the score

A major upgrade can change graphics drivers, power behavior, browser settings, or which GPU an app uses. The Graphics Test runs through the browser, so it measures the graphics path available to that browser, not every capability of the laptop's GPU. Treat the score as a repeatable comparison under similar conditions, not a complete hardware diagnosis.