Dell PowerEdge R320 User's Guide download pdf (Page 43)

NOTES

The BIOS automatically detects, sizes, and initializes the memory array,

depending on the type, size, and speed of the installed DIMMs. The BIOS

reports memory size and allocation to the system through configuration

registers.

The system does not support mixed-sized DIMMs or DIMMs from different

vendors within the same row.

DIMMs must be populated in groups of four, referred to as a row. Row 1 consists of DIMM

sockets 1-4 and row 2 consists of DIMM sockets 5-8. The DIMM sockets in each row are not side-

by-side; see Figure 17 to identify each socket and row.

Within a single row, all DIMMs must be identical, both in DIMM size and the number of devices

on the DIMM. Each of the two DIMM rows can be populated with DIMMs that use different

technologies, but for the best performance, the amount of memory on each MRH-D DDR branch

channel should be the same to enable the benefits of memory interleaving.

SCSI Controller

The LSI-531030 SCSI controller (U320) on the main board provides one primary channel to the

internal SCSI backplane and a secondary channel via an external SCSI connector at the rear of the

chassis. This device interfaces to the SIOH at clock frequencies up to133 MHz through one

channel of the primary P64H2, also located on the main board. The 53C1030 is a fully autonomous

device, capable of managing multiple I/O operations and associated data transfers from start to

finish without host intervention.

While the internal channel supports only Low Voltage Differential (LVD) signaling, the external

channel supports both LVD and SE (single-ended) signaling. With LVD signaling, the channels

can each support a maximum data rate of 320 MB/sec.

Network Interface Controller

The onboard network interface is composed of one Intel 82546EB Dual Port Gigabit Ethernet

controller connected to the second channel of the primary P64H2 PCI-X bridge, located on the

main board, at clock frequencies up to133 MHz. The 82546EB is a single component with two

fully IEEE 802.3-compliant Ethernet interfaces. It provides two stacked RJ45 ports at the rear of

the chassis.

This network interface supports Ethernet applications at 1000Base-T, 100Base-T, and 10Base-T

(802.3, 802.3u and 802.3ab) and enables network manageability implementations required for

remote control and alert over LAN.

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Dell PowerEdge R320 User's Guide Page 43