5486m550.fm Draft Document for Review October 18, 2004
130 IBM Eserver i5 and iSeries System Handbook
The #7798 is identical to #7886 IBM Rack Mount, except an adjustable set of
mounting rails/slides is shipped instead of the fixed length rails/slides used in
IBM racks.
Uninterruptible power supply
An external uninterruptible power supply is recommended to protect the
system unit and any external components against utility power outages.
The Model 550 initial installation is IBM installed. Processor upgrades within
models are performed by IBM Service Representatives.
Processor features
#8958 Model 550 Processor (POWER5 1/4-way 1.65 GHz DCM)
– Eight Dual Inline Memory Module (DIMM) memory positions (plug directly
onto the processor, direct attach)
– The Model 550 has 1.9MB of L2 cache and 36MB of L3 cache
Main storage
Supported memory features for the Model 550 are:
#4443 - 512 MB DDR Main Storage (DDR1 - 256 Mb technology, CCIN 309B)
– Ships two 256 MB DIMMs for a total of 512 MB
– Only orderable on #8950 processor with a maximum of two of these
features per system
#4444 - 1 GB DDR Main Storage (DDR1 - 256 Mb technology, CCIN 309B)
Ships four 256 MB DIMMs for a total of 1 GB
#4445 - 4 GB DDR Main Storage (DDR1 - 128 Mb technology, CCIN 30D3)
Ships four 1 GB DIMMs for a total of 4 GB
#4447 - 2 GB DDR Main Storage (DDR1 - 64 Mb technology, CCIN 30D2)
Note: A #1827 Serial-UPS conversion cable is required to provide UPS
control/feedback information for the Eserver i5 Model 550. This does not
impact the ability of the UPS to provide power in case of an outage. Its
absence prevents the UPS from alerting the Model 550 that it is under UPS
power and from advising the server to the amount of remaining UPS
battery power.
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