Only a handful of people have traveled to such staggering depths. One of them is movie director James Cameron, who using a state-of-the-art vessel, dropped 35,000 feet, or about 7 miles, to the deepest place on Earth -- the Challenger Deep in the western Pacific Ocean.
DPI stands for dots per inch. Depending on the mouse make it will have certain presets (e.g 3000, 6000) and pressing it will cause your mouse to cycle through them. The higher the DPI , the farther the cursor on your screen will move when you move the mouse.
Ninety percent of the expert gamers there will be using a DPI value between 800 to 1,600, he said. If you paid some serious money for your gaming mouse, check out its stats: it's likely it can do some multiple of 1,600 at maximum sensitivity.