
Server Board Features
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Server Board Features
At the heart of the system is a set of four processor serverboards (motherboards) based on the
AMD Opteron chipset and designed to provide maximum performance. Below are the main
features of the serverboards.
Processors
Each of the four serverboards in the C2112-4G3 supports one or two 8-core or 12-core AMD 6100
series Opteron processors. Each processor sits in a 1944-pin “G34” socket and is interconnected
via HyperTransport (HT) 3.0 link support, see the next subsection for more information.
HyperTransport Interconnect
The HT link is a packet-based link implemented on two unidirectional sets of signals. The link is
nominally point-to-point, and connects exactly two devices. Devices can have multiple HT links
to allow the construction of larger HT fabrics.
The HT link consists of a point to point x16 link (16 bits) that supports 6.4 GT/s per link in each
direction. The HT link is designed to deliver a scalable, high-performance interconnect between
CPUs and CPU to I/O devices.
Memory
Each serverboard in the system has 16 DIMM slots (eight per processor) that support DDR3
1333/1066/800 MHz DDR3 registered ECC SDRAM (see “Installing Memory” on page 33).
Serial ATA
A Serial ATA controller (AMD SP5100) is integrated into each of the system serverboards to
provide a six-port 3 Gb/s SATA subsystem; note that only three drives are supported per
serverboard. One to three Jbod drives connect to each serverboard via the drive backplane
installed near the front of the server. The “system disk” is drive 0 in each array and any additional
drives are “data” disks. For best system throughput all disks should be the same speed and
capacity.
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