• 17 to 18 inches:If your laptop stays on your desk all day every day, a 17 or 18-inch system could provide you with the kind of processing power you need to play high-end games or do workstation-level productivity. Because of their girth, laptops this size can pack in high-voltage quad-core CPUs, power-hungry graphics chips and multiple storage drives. Just don’t think about carrying these 7+ pound systems anywhere.