Hello, my poison viper ultimate version has slow DPI a year ago, I tried everything to no avail, including downloading Thundercloud 3 and updating the firmware, I even changed the computer and another new virus The Viper Ultimate Edition test does not work. I'm pretty sure my dpi was 800 and the return was 125 before and after the problem. But before that, my firmware was 1.02, and I hadn’t updated it, but there was still a problem, so I updated it to 1.06, and the problem still exists