How to compare memory performance on two PCs
Run the same browser RAM test on each PC, compare read, write, copy and response-time results, and avoid common testing mistakes that skew scores.
One PC feels quicker than another, or you want to check whether a RAM upgrade made a difference. A fair comparison starts with the same test, run under similar conditions on both machines.
The Memory Test (RAM) measures read, write and copy speed, plus response time. Use it on each PC, then compare the results rather than relying on a computer's memory label or a single score.
Run the same memory test on both PCs
- Open the Memory Test (RAM) on the first PC. Use the same browser on both computers if possible, and keep the browser window in the foreground.
- Close programs and browser tabs you do not need. Wait until the PC is idle, then run the test and note the read speed, write speed, copy speed, response time and score.
- Run the test two more times on the first PC. Write down each result rather than keeping only the highest score.
- Repeat the same process on the second PC. Use the same browser, power conditions and number of test runs, then compare the typical results for each measure.
Keep a simple note with the PC name, whether it was plugged in, the browser used and the test results. That makes it easier to spot a meaningful difference instead of one unusually fast or slow run.
What the results mean
One PC has higher read, write and copy speeds
That PC moved data faster in this browser test. Differences in RAM type, speed, number of memory channels, processor, and system settings can all contribute. A higher result does not prove that every program will run faster, because many everyday tasks do not use memory in the same way.
One PC has a lower response time
Lower response time means the test saw less delay when accessing memory. Compare this number alongside read, write and copy speeds. One result alone does not tell you which PC will feel faster in every situation.
The scores are close, but individual results vary
Small differences can come from normal changes in background activity, temperature, power settings or browser workload. If the results overlap across repeated runs, the test may not show a consistent advantage for either PC.
The score out of 100 is different
The score summarizes this test's measured performance. It is not a grade for the whole computer, a measure of installed RAM capacity, or proof that the memory is error-free. Use the individual speed and response-time results to understand what changed.
Make the comparison fair
- Use the same test conditions. Run the test in the same browser and keep the window visible on both PCs. Avoid comparing a fresh test on one computer with a test running in a background tab on the other.
- Match the power conditions. Compare both systems while plugged in, or both on battery. On Windows 11, check Settings › System › Power & battery › Power mode. On a Mac, check System Settings › Battery and use the same Energy Mode option if it is available.
- Let background work finish. Pause large downloads, file copies, software updates, video playback and cloud synchronization. These tasks can compete for processor and memory resources, changing a browser test result.
- Repeat runs after the PCs are idle. Three runs on each computer can reveal whether a result repeats. If one run is far from the others, do not treat that single result as the normal performance level.
- Check whether the difference is consistent. Compare read, write, copy and response time separately. If one PC leads in one measure but trails in another, describe that as a mixed result rather than declaring one overall winner.
Know what a browser test cannot tell you
A browser test measures performance for its own workload. It cannot inspect every detail of the memory hardware or reproduce all the tasks you use on the computer. A result can also reflect the processor, browser, operating system, power limits and background processes, not just the RAM chips.
Do not use the browser's memory-size hint to verify how much RAM is installed. Browsers may expose only a rounded hint, not the exact amount. Check the operating system's system information for the reported installed memory, and use the test results to compare measured performance instead.
If a PC repeatedly scores much lower under matched conditions, restart it, close unnecessary programs and test again. A browser score by itself cannot confirm a faulty memory module. For suspected hardware trouble, use the computer maker's diagnostic tools or a qualified repair service.
