Razer DeathAdder V4 Pro Input Lag Test

Razer DeathAdder V4 Pro Input Lag Test - Click Latency Check

Razer positions the DeathAdder V4 Pro as a lighter wireless version of its right-hand ergonomic identity, with the black model starting at 56 g and other finishes listed up to 58 g, while HyperSpeed Wireless Gen-2 and wired USB both support up to 8000 Hz polling.¹ Razer pairs the chassis with a Focus Pro 45K Optical Sensor Gen-2 and Razer Optical Mouse Switches Gen-4, so this page is aimed at players who want to verify the mouse is actually reporting at its configured rate.

Use this tool to measure click latency from the primary button press to the browser event and to watch whether your Hz chart stays near 125, 500, 1000, 4000, or 8000 Hz depending on the active Synapse profile.

Specifications²

Polling rate and connectivity

The V4 Pro reaches up to 8000 Hz through Razer HyperSpeed Wireless Gen-2 or a wired USB connection. For the wireless test, use the HyperSpeed dongle in a direct rear motherboard USB-A port and keep other 2.4 GHz transmitters away from the signal path. Your Hz reading reflects the browser's getCoalescedEvents() output, which exposes un-coalesced pointer changes where the browser supports that API.³ Confirm the active polling rate in Razer Synapse before testing; the mouse stores the last-used Synapse profile in onboard memory, and the chart will follow the rate the mouse is currently configured to report.²

A chart near 1000 Hz usually means the mouse is running a 1000 Hz profile, the dongle is not connected correctly, or the OS input path is coalescing reports. If the chart shows intermittent drops, move the dongle to a direct rear USB-A port, close unnecessary background applications, and retest before changing the mouse profile again. The key comparison is not a single click value, but whether the Hz chart holds close to the configured rate with low variance.

Why 8000 Hz can still read as 1000 Hz

An 8000 Hz-capable mouse can still report a 1000 Hz chart when the active profile, dongle path, or browser event path is not passing every high-frequency sample. That result does not prove the mouse is faulty; it tells you which part of the input chain to check first. Reconfirm the Synapse profile, reconnect the adapter, and compare the chart before changing switch or actuation settings.

Switch technology and click latency

Razer describes the Gen-4 optical switches as redesigned from the ground up, with improved tactility, speed, and a click lifecycle rated above 100 million actuations.¹ In this browser test, the optical beam registration removes the contact-bounce behavior associated with mechanical switches, but the logged click latency still includes browser event handling, OS scheduling, USB delivery, and your own press consistency.

How shape affects click latency variance

The V4 Pro's right-hand contour gives palm and claw grip players a larger contact area under the primary button. That can make repeated presses land at a similar depth and angle, which often reduces scatter in the click latency log. It does not make the browser report a lower hardware latency number by itself; it mainly helps you compare settings without grip position changing between clicks.

Testing this mouse

Set the polling rate in Synapse first, then close Synapse if you want the cleanest baseline measurement. Run the test with the dongle in a direct rear USB-A port or with the mouse connected by its USB cable, then compare the chart against the configured rate rather than against a marketing maximum. If the Hz chart drops intermittently, check whether Windows USB selective suspend is affecting the port before assuming the mouse cannot hold the selected rate.⁴

For click latency, click 20 times at a steady pace inside the tracking zone and look for the average and the spread of the log. A few high outliers are more likely to come from scheduling noise than from the switch, while a consistent pattern across wired and wireless modes points to a setup issue worth isolating. Test one change at a time: dongle position, polling profile, USB cable path, then background applications.

Interpreting wired and wireless baselines separately

A wired baseline is useful because it removes the 2.4 GHz path from the diagnosis. If wired readings hold near the configured rate but wireless readings drop, investigate dongle placement, battery level, and nearby RF sources. If both paths behave the same, the more likely cause is the polling profile, USB path, or system scheduling rather than the wireless link.

Logging the battery level alongside the polling profile keeps wireless comparisons honest because a low charge can force the mouse to reduce its report rate before you notice. Run a wireless baseline in this DeathAdder V4 battery latency check with the battery above half and compare it to the same profile on a full charge if the chart dips. A drop that tracks battery level is a power-management effect, not a fault in the switch or the wireless receiver.