Apple Mac Pro (Early 2009) - Manual (Page 42)

42 Chapter 3 Making a Good Thing Better
Before you install memory, determine whether you have a quad- or 8-core Mac Pro by
removing the side panel following the instructions on page 37, and looking inside:
 A quad-core Mac Pro has one processor and four memory slots. You can install 1 GB
or 2 GB DIMMs for a total of up to 8 GB of memory. See “Installing Memory in a Quad-
Core Mac Pro” on page 43.
 An 8-core Mac Pro has two processors and eight memory slots. You can install 1 GB,
2 GB, or 4 GB DIMMs for a total of up to 32 GB of memory. See “Installing Memory in
an 8-Core Mac Pro” on page 52.
Quad-core 8-core