Silicon Graphics Altix XE250, User Manual

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Node Board Features
007-5467-001 1-5
Processors
The node board supports single or dual Intel® Xeon® processors (CPU 1 and CPU 2 in Figure 1-2
and Figure 1-3 ) 600/1333 MHz. Quad-core Intel Xeon processor sequence 5400 or dual-core Intel
Xeon processor sequence 5200 are supported as long as both CPUs are of the same type.
Memory
The node board has sixteen 240-pin DIMM slots that can support up to 128 GB of FBD (fully
buffered DIMM) ECC DDR2-800/667 SDRAM. The memory operates in a 4-way interleaved
configurations and requires modules of the same size and speed to be installed two at a time (refer
to
Figure 1-3 and Figure 1-4 ).
Serial ATA (SATA) Controller
A SATA controller is integrated into the ESB2 (South Bridge) chip and provides a six-port 3-Gb/s
Serial ATA subsystem. This feature is not supported for the initial release of the SGI Altix XE250
server (refer to
Figure 1-4 ).
PCI Expansion Slots
The node board has three PCIe x8 slots (two are generation 2), one PCIe x4 slot, two 64-bit
133/100 MHz PCI-X slots and one UIO slot (refer to
Figure 1-3 and Figure 1-7 on page 11 ).
Note: If you populate the UIO slot you cannot use the 133 MHz PCI-X bus in slot 1 due to the
physical space requirements of the UIO card. Conversely, if you populate the 133 MHz PCI-X bus
in slot 1 you cannot use the UIO slot.
UIO
The node board features Universal I/O technology (PCI-U) connector that supports a Supermicro
AOC-USASLP-L8i UIO card to control internal SATA/SAS drives in a RAID 0, 1, or 10
configuration.