IBM 86884RX Installation Guide - Page 27
System assembly, Cache/Scalability Controller
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For more information about the features of the Itanium 2 processor, go to: http://www.intel.com/design/itanium2 1.5 System assembly Unlike the x440, then x450 does not use a single SMP Expansion Module, which contains the processors, memory, XceL4 Server Accelerator Cache, and respective controller. Instead, there are now two separate assemblies: A single memory-board assembly, located at the top of the system, which contains the physical DIMM's as well as the memory and I/O controller A single processor-board assembly, located at the bottom of the system, which contains the processors, XceL4 Server Accelerator Cache, and L4 Cache/Scalability Controller See Figure 1-7 on page 14 for the location of the memory-board and processor-board assemblies. Tip: Be careful when removing or installing either the memory-board assembly or the processor-board assembly, because it is possible to damage the midplane. Chapter 1. Technical description 13
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