Specifications

Memory Quadra/Centris - 4
Quadra 800
The Quadra 800 has 8 MB of
DRAM soldered to the logic
board. Total memory can be
expanded to 136 MB.
Note: Use 80 ns or faster VRAM SIMMs.
Memory Information
DRAM Speed 60 ns
SIMM Type 72-pin
Soldered DRAM 8 MB
Number of SIMM Slots 4
Supported Sizes in MB 1, 4, 8, 16, 32
Maximum DRAM 136 MB
Virtual Memory 1 GB
Soldered VRAM 512K
Number of VRAM Slots 2
The Quadra 800 uses “memory interleaving”
which occurs when like SIMM pairs are used
(for example two 8 MB SIMMs). Basically, it
allows the memory subsystem to write to the
same memory address in different banks of
memory before incrementing the address.
Depending on how memory-intensive the
application is, memory interleaving can
improve performance 5% to 10%.
DRAM Configurations
8 MB The Macintosh Quadra 800 and
Apple WorkGroup Server 80
logic boards have 8 MB of
soldered DRAM.
136 MB Use 1, 4, 8, 16, or 32 MB 72-
pin SIMMs.
VRAM Configurations
512K The Quadra 800 logic board has
512K of soldered VRAM.
1 MB Install two 256K VRAM SIMMs.