Chapter 4
Removing and Replacing Components
System Memory DIMMs
49
Supported DIMM Sizes
Supported DIMM sizes are 256 MB, 512 MB, 1 GB, 2 GB. Dissimilar DIMM sizes may be used across the
entire extender board but all four DIMMs in each quad must match. For cooling purposes, DIMM fillers must
be used in some unused slots.
DIMM Slot Fillers
Both the sixteen and thirty-two DIMM extender boards have DIMM slot filler boards placed over all unfilled
DIMM slots. As you fill DIMM quads with additional memory you must remove the DIMM slot fillers covering
the affected slots. All remaining DIMM fillers in unused slots must remain in place to maximize internal
cooling. See Table 4-1, “DIMM Filler Requirements for 16 DIMM Extender Board.”
NOTE
One DIMM filler board covers two adjacent DIMM slots. As a general rule, only remove DIMM
slot fillers as you add memory and the correct configuration will always remain.
Table 4-1
DIMM Filler Requirements for 16 DIMM Extender Board
16 DIMM Extender Board
DIMMs Loaded
Fillers Required
a
a. One DIMM filler board covers two adjacent DIMM slots.
4 DIMMs in quad 0
6 fillers total:
2 fillers in quads 1, 2, and 3
(all quads filled)
8 DIMMs in quads 0 and 1
4 fillers total:
2 fillers in quads 2 and 3
(all quads filled)
12 DIMMs in quads 0, 1, and 2
2 fillers total:
2 fillers in quads 3
(all quads filled)
16 DIMMs in quads 0, 1, 2, and 3
No fillers required
