User Guide

Basics Memory - 46
Memory
SDRAM DIMMs
The iMac computer uses SDRAM in a SO-DIMM slot that is
smaller than the RAM slots for previous desktop Power
Macintosh computers. There are two SDRAM SO-DIMM slots.
The bottom slot contains the pre-installed 32 MB SO-DIMM.
The top slot is user installable.
If a customer orders extra RAM via the build-to-order
(BTO) program, that RAM will be installed in the upper
slot. This means that a customer may get their iMac with
both RAM slots populated. In addition, end users are
permitted to install/upgrade their own RAM on the iMac
computer. Therefore, you should not assume there is a free
RAM slot in the customer’s computer.