Start by separating hardware from software.
USB and Bluetooth can expose the same controller through different drivers, reports, and feature support. That can affect the displayed device name, mapping, vibration availability, update consistency, and whether special controls appear.
A fair comparison keeps the controller, computer, browser, test actions, power settings, and background workload the same. Change only the connection, then save a report for each mode.
Wired is not automatically better in every practical setup, and a browser-observed update estimate is not a complete latency measurement. Reliability, convenience, range, battery life, and native game support also matter.
Work through the likely causes.
- 01
Charge the controller and update it only through supported official tools if needed.
- 02
Connect by a known-good USB data cable, reload the tester, and complete buttons, sticks, triggers, and an update-rate sample.
- 03
Save the report with a clear Wired label and note the browser and operating system.
- 04
Disconnect USB, pair the same controller through Bluetooth, then reload and repeat the identical sequence.
- 05
Compare missing inputs, mapping, stability, haptic availability, and repeated measurements rather than one headline number.
Check what the browser can see.
Open the full tester to inspect buttons, sticks, triggers, mapping, range, and neutral noise.
Repeat before you conclude.
A repeatable issue across connections, browsers, and native games is stronger evidence of a controller fault than a one-time browser reading. If the problem appears only in one game, review that game’s controller support, deadzone, remapping, and launcher settings.
What to keep in mind
Do not compare results collected under different power-saving or system-load conditions.
How the browser readings are defined
Our live tools use the standardized browser Gamepad interface and explain its limits in our methodology. Device mappings and proprietary features can still differ by operating system, browser, connection, firmware, and controller mode.
Questions about this issue
Is USB always lower latency?
Not as a universal rule. Controller implementation, wireless protocol, drivers, game processing, and display timing all contribute. This site does not measure full end-to-end latency.
Why is vibration available only over USB?
The browser or operating-system driver may expose haptics for one transport but not another. The controller may still support vibration in native games.
Does 2.4 GHz wireless count as Bluetooth?
No. Proprietary 2.4 GHz receivers and platform adapters use their own protocols and drivers. Test them as a separate connection mode.