Apple Setting Up Your Power Macintosh G4 (PCI & AGP) - Manual (Page 26)

26 Chapter 2
About Memory
Your computer can accommodate additional dynamic random-access memory (DRAM) in
packages called Dual Inline Memory Modules (DIMMs). The following illustration shows the
memory (SDRAM) slots on the logic board. See the sections that follow for important
information about DRAM.
Video memory ( VRAM) for standard Macintosh models is supplied by synchronous DRAM
(SDRAM) soldered onto the 66 MHz graphics card that supplies the computer’s monitor
port. Standard Macintosh models come with a minimum of 16 megabytes (MB) of SDRAM
video memory.
You can use the Apple System Profiler to check the amount of DRAM and VRAM installed in
your computer. (The SDRAM DIMM slots are numbered starting from the innermost position
as DIMM0, DIMM1, DIMM2, and DIMM3.)
PCI slots 2-4: 33 MHz PCI slots (3)
PCI slot 1: 66 MHz PCI slot
(graphics card installed)
SDRAM slots (4) Battery