Failure to follow these instructions could result in damage to your equipment and may void your warranty. Replacing memory in your computer requires five basic steps: · Turn off the computer. · Remove the computer core from the enclosure. · Remove the DRAM DIMM you are replacing. · Install the replacement DRAM DIMM in its slot. · Replace the computer core in the enclosure. Note: A video version of the replacement instructions is available at http://www. apple. com/installparts Tools Required No tools are required for this procedure. Electrostatic Discharge (ESD) Static electricity, a normal and natural phenomenon, builds up on your body as you walk around. You experience an electrostatic discharge (ESD) when you touch an object and feel a spark. ESD can cause damage to the internal components of your computer. To avoid ESD damage, read and follow all instructions. If a grounding wrist strap is included with your replacement memory, refer to the instructions included for how to ground and use the strap. 073-0544 About Memory Memory cards called Dual Inline Memory Modules (DIMMs) provide dynamic random-access memory (DRAM) to your computer. The DIMMs are installed in three memory slots on the logic board. DRAM DIMM Your computer uses synchronous DRAM (SDRAM) DIMMs that must be compatible with the computer's specifications. Replace the DIMM in your computer with the replacement DIMM provided in this package. Do not use DRAM DIMMs from older computers, even if they fit into the DIMM slots. Note: Different size DRAM DIMMs can be installed in any order in any DIMM slot. You also do not have to install DIMMs in pairs, as in some older Macintosh computers...