So there are three main things I do on my computer: Play Starcraft, at 640x480 4:3, 1.33 ratio Play Osu!, at 1280x960 (double that of 640x480) Browse Techspot/do whatever on my desktop at my native resolution 1920x1200 8:5, 1.6 ratio. Switching mouse sensitivity between Starcraft and Osu! is easy. In Starcraft, I have my mouse at 625 DPI. In Osu!, obviously I just use 1250 DPI. Now my 24" monitor's resolution is native 1920x1200, which is, again 1.6 (uhhg D:, though it looks pristine). That means my desktop's sensitivity is going to be inconsistent. With 1920 being three times 640, if I want my horizontal sensitivity to be the same, I have to set my sensitivity to 1875. Now with 480 being only 2.5 1200, my ideal vertical sensitivity must be 1562.5. Not only is that impossible for my mouse, but I can't have both. In the recent past, what I've done was average the two for 1718.75, then set my mouse to 1750, which is the closest my mouse will let me. With doses of nightly Osu! and nightly sessions of Starcraft, I suppose I minimized the effect, but after a week of fasting with my desktop, my muscle memory in both Starcraft and Osu! have failed! I was sure that 1920x 1440 would not be an available option; low and behold, +1 to NVidia control panel! I was, however confident that I would get an out of range error if I tried it. Desperation leads to success! Or not...it left two bars on the side of my screen. No, they are not black, rather they are a pair of mirrors. Weird, everything I put on one side, show faintly on the other. It's hard to describe, and I can't take a screenshot since it's just my monitor screwing with me over; it looks perfect from screenshots. You'll just have to believe me that it won't work out. From my dilemma, I've derived a couple solutions to my sensitive problem: I could use a lower resolution with a 1.33 ratio, which look hideous and does not do my background justice. I could try and make my monitor work at 1920x1440, help me out here. This is my monitor; I have a 9600gt. SCEPTRE-24WG-Naga 16:10 LCD My mouse is a razer Lachesis. My post was long-winded and confusing, but if you take the effort to read it, I think it provides a sufficient explanation to a tricky problem. So, thank you very much. Bottom line, because the aspect ratio changes, I can't just change my mouse DPI at a linear rate to keep my sensitivity parallel. .