How to test RAM write speed on a Chromebook

Your Chromebook feels slow when several tabs are open, or you want to check its memory after a repair. A RAM write test can show how quickly a browser workload writes data to memory, but the result needs context: it is not a diagnosis of faulty RAM or a measure of storage speed.

Use the Memory Test (RAM) to check write, read, and copy speed, response time, and a score out of 100. Run it under consistent conditions so you can tell whether a change is meaningful.

Test RAM write throughput

1. Open the Memory Test (RAM) on the Chromebook you want to check. Close any work you do not want to lose before starting.
2. Run the test and let it finish. Keep the TooLab page in the foreground, and avoid switching tabs or starting other demanding tasks while it runs.
3. Look at the write result, along with the read and copy results, response time, and score. Record the numbers if you plan to compare them later.
4. For a comparison, repeat the test after the Chromebook has cooled and the same number of tabs and apps are open. Keep it plugged in for both runs, or unplugged for both.

A single run is a snapshot, not a permanent rating of the Chromebook. A few small differences between runs are normal because the browser, operating system, and other open tasks share memory and processor time.

What the result means

The write result is similar across repeat runs

That is a useful baseline for this Chromebook under these conditions. Save the result with a note about whether it was plugged in and which browser you used. If you later see a change, repeat the test before deciding that the hardware has become slower.

The write result is lower than expected

There is no single write-speed cutoff that proves a Chromebook is faulty. The result depends on the device, browser version, available memory, power state, and background activity. Compare the Chromebook with its own earlier results, not with a different model or a desktop PC.

The result changes a lot between runs

Changing numbers often point to changing conditions rather than a broken memory chip. Many open tabs, extensions, background updates, a warm device, or a hidden browser tab can affect a browser test. Repeat it after closing other work and restarting the Chromebook.

The page slows down or closes during the test

The Chromebook may be short on available memory or busy with another task. A crash does not by itself prove that RAM is defective. Close tabs and apps, restart, then try one more run. Stop if the device becomes unusually hot or unstable.

Write throughput is the rate at which this test writes its workload into memory. It is different from how quickly a file saves to a drive. A browser test also cannot show the exact amount of installed RAM: browsers receive only a rounded hint about memory size.

How to get a steadier result

1. Close extra tabs and apps. Keep only the test page and any essential work open. Streaming video, video calls, and large web apps can compete for memory and processor time.
2. Check what is using the browser. Open Chrome's menu, then choose More tools › Task manager. Close a tab or extension that is using unusually high resources, then rerun the test.
3. Restart the Chromebook. A restart can clear a busy or unresponsive browser session. After signing back in, open only the test page and run it again.
4. Keep power conditions the same. A Chromebook can behave differently on battery than when plugged in. Compare two plugged-in runs, or two battery-powered runs, rather than mixing them.
5. Let the device cool between demanding tasks. If you have just used a video call or another heavy app, wait a few minutes before testing. Heat can cause a computer to reduce its speed to manage temperature.
6. Try an updated browser. Install available ChromeOS updates, restart, and test again. If the result changed after an update, compare with another run under the same conditions before drawing a conclusion.

When it may be a hardware problem

A low write result alone is not enough to identify a RAM fault. Look for a broader pattern, such as frequent freezes, unexpected restarts, or problems that continue after a restart with few tabs open. If the Chromebook has built-in diagnostics, run the memory check provided by its manufacturer or ChromeOS. Contact the manufacturer or a repair shop if the device continues to fail those checks or becomes unreliable.

Many Chromebooks have memory soldered to the main board, so the RAM may not be replaceable as a separate part. Check the device's service information before considering a repair or replacement.

Use the test as a comparison, not a verdict

For a fair comparison, use the same Chromebook, browser, power state, and general workload each time. The Memory Test runs in your browser on the Chromebook, and its score describes that test run, not the condition of every part of the computer.