24 PowerEdge R320 Technical Guide
7 Networking and PCIe
The Dell PowerEdge R320 offers balanced, scalable I/O capabilities, including integrated PCIe 3.0
capable expansion slots. The R320 supports up to two PCIe slots.
Embedded NIC controller
The R320 system board has one embedded NIC controller. The Broadcom 5720 Gigabit NIC chip is
connected to the platform controller hub through a PCIe 2.0 x2 link.
The Broadcom 5720 is a 14
th
generation 10/100/1000Base-T Ethernet LAN controller solution
suitable for high-performance server applications. The Broadcom 5720 combines dual triple-speed
IEEE 802.3 compliant Media Access Controllers (MACs) with dual 10/100/1000 Ethernet transceivers
(PHYs), selectable individually per port, a network controller-sideband interface (NC-SI), and an
on-chip memory buffer in a single device. The device provides a PCIe 2.1-compliant interface,
which operates at 5GT/s or 2.5GT/s x2 link width.
PCIe expansion
The R320 provides expanded PCIe slot capability over the previous servers. This is made possible by
the 40 PCIe lanes available from each processor in the system. Dell designed the R320 to be PCIe
3.0-compliant in order to take full advantage of the processor capabilities.
PCIe slots
PCIe connectivity is integrated with the processor and chipset. Table 14 lists the slot configurations
for the R320.
Table 14. PCIe slot configurations
PCIe x8 connector with x4 bandwidth; half-length, half-height, 2.0
PCIe x16 connector with x16 bandwidth; half-length, full-height, 3.0
Storage slot for PERCs H310 or H710
PCIe expansion cards
The R320 supports a variety of PCIe expansion cards. Table 15 lists the supported add-in NICs and
HBAs for the R320.
Table 15. Supported NICs and HBAs
Broadcom 5720 2x1Gb Base-T
Broadcom 5719 4x1Gb Base-T
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General
Weight and Dimensions
