Locations - Models 830, Sb2 System Unit With Fc 9074 Base I/O Tower - IBM iSeries 270 Service Manual

For the Model 825, the Main Storage DIMMs are installed directly onto the processor cards. Each
processor card has eight (8) DIMM slots. The eight slots are arranged in two sets of four (4). The DIMMs
must be installed in sets of 4 (quads). Each set of 4 DIMMs must be the same memory capacity and
technology. Each system order must have at least one set of 4 main storage DIMMs (quad) installed.
For the 6-way processor features, 3 processor cards are installed in the system. There is a total of 24
DIMM slots in which 4, 8, 12, 16, 20 or 24 memory DIMMs may be installed.
When replacing a processor card, move any memory DIMMs from the old card to the corresponding slot
on the new card.
The sequence for plugging DIMMs is to fill a set of four on the first processor card in C13, then fill a set of
four on the second processor card in M01 (if used), then fill a set of four in the third processor card in M02
(if used). After that fill the second set of four on each processor card.
Locations — Models 830, SB2 System Unit with FC 9074 Base I/O Tower
For use by authorized service providers.
The following diagram shows field replaceable unit (FRU) layout in the Models 830, SB2 System Unit with
FC 9074 Base I/O Tower. Use it with the tables and additional diagrams below. If you need address
information, refer to Addresses — Models 830, SB2 System Unit with FC 9074 Base I/O Tower.
Figure 1. Models 830, SB2 System Unit with FC 9074 Base I/O Tower (single line cord)
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Hardware (Remove and Replace; Part Locations and Listings)