Sensor

Tracking capabilities are provided by the PixArt PMW3389, which is a top of the line optical sensor featured in many high-end gaming mice nowadays, including the reviewed Pulsefire Surge from HyperX. It provides raw and very responsive tracking with no added acceleration or deceleration whatsoever. There is some smoothing on and above 1900 CPI, which is there to reduce jitter, but results in some input lag, so for professional use, you should stay below 1900 CPI.

Now for some specifications: the nominal maximum tracking speed and acceleration values are 450 IPS and 50 G, which are insanely high; there is no way of hitting these values during regular use. Resolution can be set from 100–16,000 CPI in steps of 50 CPI. The polling rate is 1000 Hz; for some reason, there is no way of adjusting it in the software. Same goes for the lift-off distance; it is set to a hair below a DVD in height (1.2 mm).

Paint Test

There is no jitter on the reasonable CPI steps, and I couldn't detect any unwanted angle snapping or sensor rattle either.

CPI Divergence

Thankfully, CPI divergence on this mouse is very low compared to most newer gaming mice. Please note that this measurement is not 100% accurate as there is some human error involved, but the values resemble reality well.

Perfect Control Speed

Perfect control speed (or PCS for short) is extremely high on this sensor as 450 IPS is over 11.4 m/s. There is absolutely no way of hitting it while using the mouse regularly—hitting 450 IPS will still be very challenging on even a 2 m long mouse pad.

Speed Related Accuracy Variance

This test shows the sensor's accuracy at different speeds. You can see me doing a fast swipe to the right before I slowly slide the mouse back to its original position. There is pretty much no acceleration or deceleration here.

Polling Rate

The polling rate is nice and stable, without any suspicious periodic drops or outliers. As previously mentioned, only 1000 Hz is available, which is a response time of 1 ms.

Input Lag & Smoothing

As can be seen well on the xCount graphs' kinks, there is some detectable smoothing on and above 1900 CPI. The smoothing is added to reduce jitter above a certain CPI value, and it increases at specific levels. Should you worry about it? Only if extremely sensitive to this or playing competitively. If so, stay below 1900 CPI; if not, use whatever you like. Generally, it's better to stay on a lower value.

Click Latency

Click latency is roughly +12.9 ms when compared to the SteelSeries Ikari, which is considered as the baseline with 0 ms. The data comes from this thread and my own testings. Testing was done with a Logitech G102 and the FPS Pro, using qsxcv's program. Click latency is relatively high, which could be intentional as it reduces chances of accidentally double clicking (a common fault of micro switches, it can appear after even a few weeks of use).