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3: System Overview
IP115 Blade Architecture Overview
An enhanced and updated multi-core version of the SGI ICE compute blade is used in specific
versions of the ICE X systems. The IP115 blade architecture is described in the following sections.
Two dual-socket node boards are installed in each blade. Each node board in the blade contains
the processors, memory, and the following fourteen-data rate (FDR) InfiniBand imbedded HCA:
•
Two HCAs each with a single-port IB connector
Each of the two node boards inside the compute blade is configured with two multi-core Intel
processors - a maximum of 32 processor cores per compute blade at the time this document was
published. Note that the two node boards within the blade are logically independent. Each
processor assembly uses a liquid-cooled “cold-sink” to draw off heat from the CPU.
Note:
In a blade enclosure-pair using IP115 nodes, all four switch blades must be present, as two
switch blades are required for each enclosure. This configuration supports a single-plane topology
in each of the blade enclosures.
A maximum of 16 DDR3 memory DIMMs are supported per compute blade (8 on each node
board). The DIMM slots support up to 1600 MT/s DIMMs.
Each node board in the IP115 blade assembly supports one optional 2.5-inch hard disk drive or
solid state drive (SSD).
The two processors on each node board in the IP115 blade maintain an interactive communication
link using the Intel QuickPath Interconnect (QPI) technology. This high-speed interconnect
technology provides data transfers between the on-board processors. See the section “QuickPath
Interconnect Features” on page 34 for an overview of the link functionality and bandwidth
capability.
The IP115 compute blade cannot be plugged into and cannot be used in “previous generation” SGI
Altix ICE 8200 or 8400 series blade enclosures. Usage in third-party or non SGI ICE X racks may
be restricted due to thermal requirements.
Multi-generational system interconnects can be made through the InfiniBand fabric level. Check
with your SGI service or sales representative for additional information on these topics.
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