
20 Cray T3E User’s Guide
Chapter 3
The Cray T3E system
This chapter reviews the Cray T3E hardware and operating system.
3.1 Hardware overview
The Cray T3E system consists of the following hardware components:
• processing elements
• interconnect network
• I/O controllers
• external I/O nodes.
This section briefly presents each of the system components and their
interactions.
The current configuration at CSC is as follows:
• For parallel programs there are 224 application processing ele-
ments (PEs) which contain 375 MHz processors.
• In addition, there are 16 command and operating system process-
ing elements.
• Each processing element has 128 MB of local memory.
• The total memory in the application PEs is 28 GB.
• The total theoretical peak performance of the application proces-
sors is 168 Gflop/s (= 224 × 750 Mflop/s).
• The local disk space is over 300 GB.
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