Dell PowerEdge R520 Technical Manual page 11

Figure 3 shows the features on the back panel of the R520 including USB connectors, Ethernet
connectors, serial connector, video connector, PCIe slots, power supplies, and many other
components and features described in this guide.
The chassis design of the R520 is optimized for easy access to components and for airflow for
effective and efficient cooling. The R520 supports up to 12 DIMMs, 2 processors, hot-plug
redundant power supplies, and many other components and features described in this guide.