Logitech on Thursday addressed its gamer audience with both a high-speed mouse and a headset. Replacing the long-serving G5, the G500 has a significantly faster laser and now tracks at up to 5,700DPI. On Windows PCs, drivers let users change the sensitivity on the spot in 100-unit increments to as little as 200DPI for slow but precise movements. It can further aid players by saving game input s