I/O Technologies - HP DL585 - ProLiant - G2 Technology Brief

The DL585 G2 supports PC2-5300 DDR2 memory at 533 MHz and 667 MHz. When more than four
DIMMS are installed on a single memory controller, the memory bus will be clocked down to
533 MHz. Table 1 lists available memory configurations for the DL585 G2.
Table 1. Memory configuration options in the ProLiant DL585 G2 server
Memory Maximum
type
PC2-5300
PC2-5300

I/O technologies

The DL585 G2 supports two types of I/O expansion slots: PCI Express and PCI-X. PCI Express (also
known as PCI-E or PCIe) is a bus technology that builds upon earlier PCI technology, but it uses a
serial interface rather than the traditional parallel PCI bus. PCI Express connections are composed of
one or more lanes. Devices that use multiple lanes use a total of 2, 4, 8, 12, 16, or 32 lanes.
Multiple lane connections are described as x4 for a 4-lane connection, x8 for an 8-lane connection,
and so forth.
Each lane is a separate serial connection comprising four wires and has a bandwidth of 250 MB/s in
each direction (for a total bandwidth of 500 MB/s per single PCIe lane link). PCI Express links
automatically negotiate the highest number of lanes that the slot and the card support. Therefore, a
PCI Express expansion card can be installed into any slot in which it will physically fit and it will work
correctly. Also, a long slot wired with fewer lanes than it can physically support can work correctly.
The DL585 G2 has seven PCI Express slots. Three of the PCI Express slots are full length x8 slots. The
other four PCI Express slots are x4: Three of the four are full length slots and the other one is half
length. The server also has two 64-bit, 100-MHz, PCI-X slots (one full-length and one half-length).
When installing PCI Express expansion cards, optimal performance can be achieved by balancing
cards across HyperTransport links. Table 2 identifies the preferred order of installation.
DIMM
capacity size
128 GB 512 MB
1 GB
2 GB
4 GB
64 GB 512 MB
1 GB
2 GB
4 GB
Maximum DIMMs
per processor
8 533 MHz
4 667 MHz
Memory
speed
6