Figure 3. Back View; Figure 4. Internal View - Dell PowerEdge R820 Technical Manual

Figure 3 shows the features on the back panel of the R820 including USB connectors, Ethernet
connectors, serial connector, video connector, system identification button connector, iDRAC7
Enterprise port, PCIe slots and power supplies.
Figure 3. Back view
The chassis design of the R820 is optimized for easy access to components and for airflow for
effective and efficient cooling. The R820 supports up to 48 DIMMs, four processors, hot-plug
redundant fans, and many other components and features described in this guide.
Figure 4. Internal view
11 PowerEdge R820 Technical Guide