IBM 86884RX Installation Guide - Page 17
IBM XA-64 chipset, named Tornado, located within the processor-board assembly.
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1.2 IBM XA-64 chipset The IBM XA-64 chipset is the product name describing the chipset developed under the code name "Summit" and implemented on the IA-64 platform. A product of the IBM Microelectronics Division, the XA-64 chipset leverages the proven Enterprise X-Architecture chipset used in the x440 and applies those same technologies to the IA-64 architecture. The XA-64 chipset is composed of the following components: Memory controller: a single memory controller, code named "Cyclone", located within the memory-board assembly. Processor/cache controller: a single processor and cache controller, code named "Tornado", located within the processor-board assembly. PCI bridges: two PCI bridges, code named "Winnipeg", per x450 located on the PCI-X board and the I/O board that control both the PCI-X and Remote I/O. Figure 1-1 on page 4 shows the various IBM XA-64 components in an x450 configuration. Chapter 1. Technical description 3
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