In the absence of the rear riser you can install the rear filler. Its purpose is to maintain proper air flow and to prevent junk from entering into the server. If you do not have any PCIe cards installed it is recommended to install either the rear riser with a PCIe blank or to use this filler.
This is a weird little rear plastic cover for the Dell PowerEdge R640. At least, that’s my best guess. What it covers I have no idea and we have speculated that it could be related to airflow. It does not effect the function of the server. If anything it provides a more aesthetic value than function.
This is the rear PCIe filler for the R740 and R740xd servers. It takes the place of risers 2 and 3. In the absence of these risers you install this blank so there’s not a gaping hole in the rear of your server. This prevents junk from entering the server and maintains correct air flow throughout the chassis.
