Thằng này giải thích khá hay. Nếu theo nó thì giống như cách mình nghĩ:
DPI is dots per inch, it also relates directly to the mouse READING, along with the movement on screen. So that said, if you use a 1024x786 screen rez, and you having a 1000DPI mouse, it would 'technicly' take 1 inch to...