![]() The above shot of an oscilloscope reading has been given to me as evidence. While I'm still confident in my findings, I want to provide this perspective as well. Mad Catz has reached out to me and is adamant that the 3000 Hz is indeed real. Looking at the interval plots then removes any remaining doubt: Furthermore, bInterval is listed as "0x01," which indicates a polling interval of 1 ms (1000 Hz) instead of 0.5 ms (2000 Hz) or 0.33 ms (3000 Hz). Pro X3 Supreme is detected as a full-speed device, which already calls into question the ability to deliver actual 2000 Hz polling. ![]() Now, the question is: Does it work? The short answer is no. That said, I have no idea why the polling rate has an effect on actual CPI.ΔΆ0 Hz USB Polling: Does It work?Mad Catz promises a USB polling rate of 2000 Hz on the R.A.T. It seems as though the steps were specifically tuned for polling rates higher than 1000 Hz. Using 2000 Hz or 3000 Hz, CPI ends up considerably lower, thus resulting in less deviation. Also note that testing has been performed at a polling rate of 1000 Hz. Using the PTFE feet, the deviation is even greater. Please note that those measurement have been done using the ceramic feet installed by default. In order to account for the measured deviation, adjusted and mostly accurate steps of 350, 700, 1400, and 2800 CPI have been used for testing. As you can see, deviation is massive and exclusively positive. ![]() I've restricted my testing to the four most common CPI steps, which are 400, 800, 1600, and 3200. ![]()
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