Sensor

As for the sensor, Dream Machines doesn't play around with low-end or mediocre ones. The DM1 FPS features the PixArt PMW3389, which is a PMW3360 variant originally patented by Razer. Even though the sensor is absolutely high-end, the implementation could use some fine-tuning. I came across some smoothing-caused input lag above 1,900 CPI. More on this a bit later, under the input lag section.

The nominal maximum tracking speed and acceleration values are 400 IPS and 50 G. The resolution can be set from 200–16,000 CPI in increments of 200 CPI. Available polling rates are 125, 250, 50, and 1000 Hz. There is no lift-off distance setting I could find, but the default value is pretty much perfect as the sensor didn't track from a DVD in height. The measurement was done on a plain black cloth mouse pad.

Paint Test

There is no jitter on the reasonable CPI steps, or unwanted angle snapping. There was some very slight sensor lens rattling, but it didn't cause more than 1–2 pixels of movement in total on even 16,000 CPI.

CPI Divergence

CPI accuracy could be better as the deviations are rather high, and they linearly increase with the CPI values. I highly suggest adjusting your in-game sensitivity accordingly.

Perfect Control Speed

Nominal maximum tracking speed is 400 IPS, which is over 10 m/s. This is an insanely high value, and there is no chance of hitting it if you use the DM1 FPS as a mouse is meant to be used. Even with a huge swipe on an extended-size mouse pad, I could never hit more than 6 m/s; my high-speed in-game flicks are about 3.5 m/s fast.

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. Any displacement is almost entirely caused by human error in this test.

Polling Rate

All set values seem to be perfectly stable; there are no significant, constant, or repetitive outliers after multiple tests; the ones you see are mere measurement errors.

Input Lag

There is no input lag or smoothing under 1,900 CPI, then after hitting this resolution it jumps up to +2 ms. This increases to around +4 ms until 6,000 CPI after that, before going up to +10 ms by the time the resolution reaches the 16,000 CPI value. For competitive gaming, I would highly suggest staying below 1,9000 CPI. This sort of linear smoothing increase is present on all PMW3389 mice I have tested so far.

Click Latency

The click latency is roughly +6.4 ms compared to the SteelSeries Ikari, which is considered as a baseline with 0 ms. The control subject was a Logitech G102 (with a covered lens). The data comes fromthis thread and my own testings.