Logitech G Pro X Superlight 2 Input Lag Test

Logitech G Pro X Superlight 2 Input Lag Test: Click Latency Check

At 60 g, the G Pro X Superlight 2 pairs LIGHTSPEED wireless with an 8000 Hz max report rate; the DEX version lists 4000 Hz wireless and 1000 Hz wired.¹² Its LIGHTFORCE hybrid switch combines a physical spring-loaded lever with an optical beam at the actuation point, preserving tactile feel while avoiding mechanical contact bounce.³ Use this tool to measure click latency from button press to browser event and to verify your polling rate.

The symmetrical design accommodates palm, claw, and fingertip grips equally.

Specifications¹

Polling rate and connectivity

For the standard G Pro X Superlight 2, LIGHTSPEED wireless supports up to 8000 Hz polling; the DEX version supports up to 4000 Hz wireless and 1000 Hz wired. Both versions also support USB-C charging/data operation, but the Hz chart reflects the active report-rate setting and the receiver or cable path you use for testing. LIGHTSPEED assigns a dedicated radio channel, so other 2.4 GHz devices do not contend for bandwidth on the wireless link. For this test, confirm the active polling rate in Logitech G HUB before starting; the current rate persists in onboard memory and the Hz chart will reflect whatever rate the mouse is configured for.

If the chart reads near 4000 Hz, check whether you are using the DEX version rather than the standard Superlight 2; the DEX variant's higher wireless polling rate produces a different chart baseline from the standard 8000 Hz model. Confirming which version you have before interpreting results saves diagnostic time. Both versions read accurately with this tool; the DEX at its configured 4000 Hz wireless rate and the standard model at its configured 8000 Hz rate both reflect normal operation rather than any configuration problem.

Identifying the standard and DEX variants before troubleshooting

Check the product label or G HUB model name before assuming a low reading is a fault. A DEX chart near 4000 Hz can be correct, while the standard Superlight 2 should read closer to 8000 Hz when configured for its maximum wireless rate. Version identification prevents unnecessary firmware changes and keeps the diagnosis tied to the mouse you actually have.

Switch technology and click latency

LIGHTFORCE is a hybrid design that places an optical beam at the physical lever's actuation point.³ The lever provides traditional tactile feel while the beam registers the event without contact bounce. Eliminating contact bounce removes the debounce filter mechanical switches require, typically 2 to 5 ms. Consequently, click latency in this test should consistently fall below 2 ms on most setups. The pre-tensioned lever design also means actuation force is consistent across the full button surface, which reduces the variation you see between clicks in the latency log.

Why LIGHTFORCE latency stays consistent across the full button surface

The pre-tensioned lever in LIGHTFORCE places the optical beam at a specific point on the travel arc, so the beam fires at the same positional moment regardless of where on the button surface your finger contacts. Side-of-button presses and center presses both interrupt the beam at the same lever position. This mechanical consistency produces click latency values in the log that show low per-click variance; it contrasts with mice where off-center contact changes the effective actuation depth before the beam fires, which produces wider log scatter.

Testing this mouse

Place the LIGHTSPEED dongle in a direct rear USB-A port on your motherboard. Close other applications to minimise OS scheduling noise in the measurements. Your Hz chart should read near the configured polling rate with low variance. If you see a reading significantly below your configured rate, check that USB selective suspend is disabled in Windows Device Manager.⁴ The Superlight 2 is not commonly reported to double-click, but if you see repeated button events from a single physical press, apply any pending firmware update in G HUB.

After confirming a correct polling rate reading, run the click latency log by clicking 20 times at a steady pace inside the tracking zone. For the Superlight 2, expect values to cluster between 0.5 and 2 ms with low per-click variance. Values that consistently read 3 ms or above on a Superlight 2 in good condition usually point to OS scheduling interference rather than LIGHTFORCE behavior; close background applications and retest to isolate whether a process is blocking the input stack between clicks.

Why version identification matters before troubleshooting

Confirm whether your mouse is the standard Superlight 2 or the DEX model before interpreting a low polling-rate reading. The DEX model has a different wireless ceiling, so a 4000 Hz chart can be correct on that version and incorrect on the standard model. Version checks prevent unnecessary firmware changes when the expected rate is simply different. Checking the product label or the model name displayed in G HUB before running any diagnostic test saves time and prevents false conclusions; a DEX unit reading 4000 Hz is operating correctly, while a standard Superlight 2 reading 4000 Hz when set to 8000 Hz indicates a genuine delivery problem worth investigating.

Running the polling check and click log back to back in this Superlight 2 polling and click pair, from the same USB port, gives you the most meaningful comparison because both readings share one input path. When the Hz chart holds at the configured rate but the click log shows scatter, the issue is almost always scheduling or press technique rather than the wireless link. Treat a stable chart as your anchor before chasing switch-level causes that the data does not support.