IBM IntelliStation POWER 285 Technical Overview And Introduction page 22

Figure 2-3 Two-core processor with DDR-2 memory socket layout view
Available processor speeds
The IntelliStation POWER 285 operates at a processor clock rate of 1.9 or 2.1 GHz for 1-core
and 2-core systems. To determine the processor characteristics on a running system, use
one of the following AIX 5L commands:
lsattr -El procX
Where X is the number of the processors, for example, proc0 is the first processor in the
system. The output from the command would be similar to the output in Example 2-1.
False, as used in this output, signifies that the value cannot be changed through an AIX 5L
command interface.
Example 2-1 Output from lsattr -El procX command
type powerPC_POWER5
frequency 1896102000 Processor Speed False
smt_enabled true
smt_threads 2
state enable
pmcycles -m
This command uses the performance monitor cycle counter and the processor real-time
clock to measure the actual processor clock speed in MHz. The output in Example 2-2 is
from a 2-core IntelliStation POWER 285 system running at 1.9 GHz with simultaneous
multithreading functionality enabled.
Example 2-2 Output from pmcycles -m command
Cpu 0 runs at 1896 MHz
Cpu 1 runs at 1896 MHz
Cpu 2 runs at 1896 MHz
Cpu 3 runs at 1896 MHz
Note: The pmcycles command is part of the bos.pmapi fileset. First check whether that
component is installed using the lslpp -l bos.pmapi command.
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IBM IntelliStation POWER 285 Technical Overview and Introduction
DIMM DIMM
DIMM DIMM
DIMM DIMM
DIMM DIMM
2 x 8 B 2 x 8 B
@528 MHz @528 MHz
DIMM DIMM
DIMM DIMM
DIMM DIMM
1056 MHz 1056 MHz
2 x 8 B for read 2 x 8 B for read
DIMM DIMM
2 x 2 B for write 2 x 2 B for write
Processor type False
Processor SMT enabled False
Processor SMT threads False
Processor state False
DCM DCM
POWER5+ POWER5+ POWER5+
core core core
2.1 GHz 2.1 GHz 2.1 GHz
2x16B 2x16B
@1.05 GHz @1.05 GHz
36 MB 36 MB
L3 L3
1.9 MB Shared 1.9 MB Shared
L3 cache L3 cache
Ctrl Ctrl
Mem Mem
Ctrl Ctrl
GX+ GX+ GX+ GX+
Bus Bus
Ctrl Ctrl
POWER5+ POWER5+ POWER5+
core core core
2.1 GHz 2.1 GHz 2.1 GHz
L2 cache L2 cache
Enhanced distributed switch Enhanced distributed switch