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Basics Dual In-Line Memory Modules (DIMMs) - 11
Dual In-Line Memory Modules
(DIMMs)
The Power Macintosh 4400 uses DRAM on dual in-line
memory modules (DIMMs). Three slots allow for memory
expansion up to 96 MB using 3.3 V unbuffered 8-byte
extended data output (EDO) JEDEC-standard 168-pin DRAM
DIMM cards. DRAM expansion slot 1 only supports single-
bank DIMMs. DRAM expansion slots 2 and 3 support both
single-bank and dual-bank DIMMs. No DRAM is soldered on
the logic board.
Important:
The single in-line memory modules (SIMMs)
used in previous Macintosh models are
not
compatible with
4400 models.
Don’t
use DIMMs that support a 4K refresh
rate. Use 168-pin, 3.3 V unbuffered EDO, 60 ns or faster
DIMMs. Also, the JEDEC MO-161 specification shows three
possible heights for the EDO DIMM. For Macintosh