Car wings are angled because you're stuck with the direction the wind goes relative to the car (assuming you're driving with all wheels on a surface). Inside a

Car wings are angled because you're stuck with the direction the wind goes relative to the car (assuming you're driving with all wheels on a surface). Inside a computer, designers have a lot of freedom in where they direct the air flow. So, they plan the layout with space efficiency in mind, taking into account the needs of cooling.