Apple M8493 Setup Guide - Page 54
Installing Memory
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Installing Memory You can install additional dynamic random-access memory (DRAM) in packages called Dual Inline Memory Modules (DIMMs) in your computer's four DRAM DIMM slots on the main logic board. You can expand your computer's DRAM to a maximum of 1536 megabytes (MB). To check the amounts of DRAM and video memory installed, use the Apple System Profiler pro gram . If you install 512 MB DIMMs they must have 256 megabit (Mbit) devices. You can also install 256 MB DIMMs that have 256 Mbit or 128 Mbit devices. You can install different size DRAM DIMMs in any order in any DIMM slot. To check the compatibility of your DIMMs, see the Apple Macintosh Products Guide on Apple's Web site: www.apple.com/guide DIMMs must fit these specifications: m "PC-100" Synchronous DRAM (SDRAM) m 3.3 volt ( V) m 64-bit wide, 168-pin module m Maximum number of memory devices on a DIMM is 16. m Unbuffered; do not use registered or buffered SDRAM. m Height must not exceed 2.0 inches. Important DIMMs from older Macintosh computers are not compatible with your Power Mac G4. Only "PC-100" DIMMs from recent Power Macintosh G3 and G4 computers and servers are compatible. Do not use older DIMMs even if they fit into the DRAM DIMM slots. 54 Chapter 4