Silicon Graphics Rackable C1104G-RP5, User Manual

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Server Board Features
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Server Board Features
At the heart of the system is a dual-processor serverboard based on the Intel C602 chipset and
designed to provide maximum performance. The main features of the serverboard are described
in the following subsections.
Processors
The serverboard supports two four, six or eight-core, Intel Xeon E5-2600 series processors. Each
processor sits in an LGA 2011 socket and is interconnected via Intel QuickPath Interconnect (QPI)
link support; see the next subsection for more information on the QPI interconnects.
QPI Interconnect
Separate QPI link pairs connect the two processors and the I/O hub in a network on the
motherboard, allowing all of the components to access other components via the network.
Each QPI comprises two 20-lane point-to-point data links, one in each direction (full duplex), with
a separate clock pair in each direction, for a total of 42 signals. Each signal is a differential pair,
so the total number of pins is 84. The 20 data lanes are divided onto four “quadrants” of 5 lanes
each. The basic unit of transfer is the 80-bit “flit”, which is transferred in two clock cycles (four
20 bit transfers, two per clock.) The 80-bit “flit” has 8 bits for error detection, 8 bits for “link-layer
header” and 64 bits for “data”. QPI bandwidths are advertised by computing the transfer of 64 bits
(8 bytes) of data every two clock cycles in each direction
Memory
The serverboard has eight DIMM slots (four per processor) that support DDR3
1600/1333/1066/800 MHz RDIMMs. Note that memory speed support is dependent on the type
of CPU used on the mother board. Up to 256 GBs of total memory is supported.
Serial ATA and Optional SAS
A Serial ATA controller ASIC is integrated into the system serverboard to provide a standard
four-port SATA disk subsystem. Drive ports 0 and 1 are SATA 3.0 ports and the remaining drive
slots are SATA 2.0 ports. The hot-swappable SATA drives are connected to a backplane that
provides power, bus termination and configuration settings. Optional RAID 0, 1, 5, 6 and 10 are
supported. Note that your operating system must have RAID support enabled to accommodate hot