Blog
Tests
Guides for testing your keyboard, mouse, screen, sound, network and other hardware, and for fixing what the tests find.
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Tests
How to compare display scaling at 100% and 125%
Compare 100% and 125% display scaling without changing resolution. Check text size, usable space, app sharpness, and which setting fits your screen.
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Tests
How to check a new memory card before a trip
Check a new SD card's speed, camera compatibility, and basic operation before you leave, so you can catch problems while there's time to replace it.
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Tests
How to test for IPv6 leaks while using a VPN
Check whether your VPN exposes your real IPv6 address, learn what the test result means, and fix leaks caused by VPN or browser settings.
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Tests
How to compare air conditioner noise between rooms
Use the same device and setup to measure air conditioner noise in two rooms, spot meaningful differences, and avoid misleading decibel readings.
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Tests
How to compare charging through two USB-C ports
Compare two USB-C charging ports with the same device, cable, and battery level. See how to read the rate and tell a port problem from a setup issue.
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Tests
Browser privacy settings blocking hardware tests?
Learn why a browser may hide device details or block permissions, how to check Browser Info, and what to change before blaming your hardware.
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Tests
How to check a PC after a power outage
Check your PC safely after a power outage, spot hardware or startup problems, and decide what to back up, troubleshoot, or repair next.
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Tests
How to verify a browser-only VPN extension is working
Check whether a VPN browser extension changes your browser's public IP and exposes your real address through WebRTC or IPv6, then troubleshoot gaps.
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Tests
Page falls back to software rendering: what to check
Find out whether one page or your whole browser is using software rendering, check the GPU path, and fix common browser, driver, or display issues.
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Tests
Fixed dot on screen: overlay or stuck pixel?
A dot that stays in one place may come from an app, monitor setting, or damaged pixel. Check its source before trying a fix, and learn what the result means.
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Tests
Why microphone levels change after rebooting
Find out whether a reboot changed your microphone, its settings, or an app's input level. Compare the same test and restore a consistent level.
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Tests
What download speed means for large online courses
Learn how download speed affects course videos and large lesson files, estimate wait times, and find out whether Wi-Fi or the course site is slowing things down.