Silicon Graphics ICE X User Manual page 47

System Models
The 42U rack for this server houses all blade enclosures, option modules, and other components;
up to 288 processors (4032 processor cores) in a single rack. The basic enclosure within the SGI
ICE X system is the 21U-high (36.75 inch or 93.35 cm) blade enclosure pair. The enclosure pair
supports a maximum of 36 compute blades, up to six power supplies, up to four chassis
management controllers (CMCs) and two or four InfiniBand based I/O fabric switch interface
blades. Note that two additional power supplies are used in an air-cooled enclosure pair and are
installed at the rear of the unit and dedicated to running the unit's cooling fans (blowers).
Optional water chilled D-rack cooling is available. Note that systems with liquid-cooled blades
reside in M-Cell racks and always require water cooling systems to operate. See the section
Chapter 4, "Rack Information" for more information on water-cooled ICE X M-Cell systems.
The basic SGI ICE X system requires a minimum of one 42U tall rack with PDUs installed to
support each blade enclosure pair and any support servers or storage units. Each rack supports two
blade enclosure pairs.
Figure 3-2 shows a blade enclosure pair and rack. The optional three-phase 208V PDU has nine
outlets and two PDUs are installed in each SGI ICE X compute rack. You can also add additional
RAID and non-RAID disk storage to your rack system and this should be factored into the number
of required outlets. An optional single-phase PDU has 8 outlets and can be used in an optional I/O
support rack.
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