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 check graphics slowdowns with multiple windows
Compare a browser graphics score with one window and several open, then check whether system load, power settings, or the GPU is slowing things down.
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Tests
How to verify a school-issued memory card's capacity
Learn how to safely test a school-issued SD card's real capacity, read the result, and tell a counterfeit card from a reader or permission problem.
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Tests
How to compare memory latency across power modes
Compare RAM response time in different power modes with repeatable tests, then separate real changes from heat, battery state, and background activity.
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Tests
Why CPU architecture labels can mislead online
A website's CPU architecture label may describe the browser or compatibility layer, not the chip. Learn what it means and how to verify it.
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Tests
Audio coming from the wrong output? How to find it
Find out whether audio is going to the wrong device, whether left and right channels are swapped, or whether an app is choosing a different output.
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Tests
Why counterfeit SD cards still format successfully
A format can finish even when an SD card lies about its size. Learn what formatting checks, how to verify real capacity, and what to do if it fails.
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Tests
Why turning off WebRTC breaks video calls
Learn why blocking WebRTC can stop browser calls, how to restore camera and audio access, and how to check for a VPN-related IP leak.
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Tests
Why horizontal scrolling fails on a mouse wheel
Find out whether your mouse, app, or settings are blocking horizontal wheel scrolling, then try fixes for Windows 11 and macOS.
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Tests
Why does my device keep starting and stopping charging?
Compare charging rates in a browser, then narrow down whether a cable, charger, port, heat, or battery setting is interrupting power.
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Tests
How to check VPN leaks on a dual-stack connection
Test whether your VPN exposes your home IPv4 or IPv6 address, learn what WebRTC results mean, and fix leaks without guessing.
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Tests
How to check a subwoofer enclosure for loose panels
Use a slow bass sweep to find panels that buzz, isolate the source, and decide whether to tighten a joint, change placement, or get a repair.
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Tests
How to compare power modes with a browser CPU score
Compare CPU scores across power modes with the same browser test. Learn how to control heat, background apps, and charging for a fair result.