
© Copyright IBM Corp. 2009. All rights reserved. 41
Chapter 3. Technical description of the
hardware architecture
IBM BladeCenter JS23 Express is a single wide blade, while the IBM
BladeCenter JS43 Express is a double wide blade, consisting of the JS23’s Base
planar and a Multiple Expansion Unit planar (MPE). The MPE planar design is
similar to the base planar, but with reduced functions. In this chapter we present
the technical details of JS23’s Base planar, highlighting the differences to the
MPE planar as appropriate.
This chapter discusses the hardware architecture, including:
“POWER6 processor” on page 43
“Simultaneous Multi Threading (SMT)” on page 45
“AltiVec (SIMD)” on page 46
“IBM EnergyScale technology” on page 47
“Flexible Support Processor” on page 49
“Management Card” on page 50
“Memory subsystem” on page 50
“I/O subsystem” on page 53
“PowerVM” on page 61
“Operating system support” on page 62
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