Originally Posted by chr1spe
Unless your sensitivity is unreasonably high 1800DPI should be enough to avoid noticeable granularity in game. The reason you get "less shaking" is probably the extremely large amount of smoothing. My g303 doesn't have that at all though. There is jitter when moving the mouse, but when the mouse is stationary it never registers counts at any DPI. What are you using the mouse on?
Well what I did was use this calculator: https://pyrolistical.github.io/overwatch-dpi-tool/
So if I had just for example 12 sensitivity at 2,000dpi, I'd calculate the new sensitivity at 12,000dpi which might be something like 1.X or 2.X. But I noticed the shaking before lowering in-game sensitivity, so at 12,000dpi at 12 sensitivity. It could just be the death-grip and resulting tension I have on the g303 (at rest), and obviously the shaking disappears once the sensitivity was lowered.
But as far as granularity and avoiding it, both mice showed less granularity when following the principles of the linked calculator above at high dpi's; I did test in-game. Due to my high sensitivity, a decent amount of pixel skipping occurs in the 2,000 dpi range, for me. I honestly don't mind the pixel skipping since it's almost imperceptible, in practicality there doesn't appear to be much difference but I still was interested to test specifically with the Razer's 16,000dpi setting.
Like, if I had 2 seconds for a shot the pixel skipping might be an annoyance in terms of accuracy. But when the flick shots are in the millisecond range I'm actually shooting based on intuition rather than pixel peeping.