DOOM & PUBG
The MM520, being software enhanced to reach 12,000 DPI is a bit wonky. The sensor is very touchy, and for normal gameplay, we could not handle much more than 4000 DPI. The cursor never wandered or jittered, but going past 4000 DPI had us wandering all over the place with little control or accuracy. Sadly, we found another issue with the optical sensor as well.
Using multiple mouse pads to test out the issue, we found that the MM520 does not like being moussed over any paint or imagery on the pad. This can be a huge downfall for the MM520, as many like to have fancy looking mouse pads. If you are going to jump on this mouse for its comfort and programmability options, which are all fine in their own right, we do suggest that you buy a solid colored surface to use it on.
Windows and Productivity
Using the mouse every day is comfortable and stress-free. However, we do still find that surpassing the midrange of DPI leads to control and accuracy issues. When editing images, it slowed us down considerably using higher DPI settings and even made it tough to double click correctly on icons on the desktop.
Using it to surf the web or to open emails was fine, but something is going on with this product, where we feel Cooler Master put the PixArt sensor on a diet of steroids; it is unlike any other optical sensor that boasts 12,000 DPI. While we were able to get by with the grind, we do feel that if accuracy is demanded, which it should be, the MM520 will have to be used at low DPI, negating the fact it offers what it does.
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