Screwless front fan
The front bottom has two interesting features. The first is the screwless fan bracket. It takes a 92mm fan and can be switched out in less than five seconds. The second feature is the snap-down caps to hold extra large cards in place. Servers commonly use SCSI and modem cards that might extend all the way to the front of the case. The snap-down caps hold these cards securely in place.
Snap-down caps for large cards