- Apr 11, 2005
The chin is exactly the same height on all three models. It just looks smaller on the 20 and 24 b/c of the proportion of screen to chin.they're able to fit it in a 17" too. but the 20 and 24 run cooler i bet too since they have more airflow. also i think they have smaller 'chins' than the 17"
3.5" drives are pretty big when you factor in mounting brackets, more fans since hard drives get super hot and all that.