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Power Macintosh G3 Q&A - Updated February 19, 2010
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How do you upgrade the RAM in the Power Mac G3 models? How much RAM of what type does the Power Mac G3 actually support?
Specifics regarding the memory for each Power Macintosh G3 model is provided on the specs page for every system, but general information regarding the type of memory, number of memory slots, and maximum supported RAM also are provided below.
Please note that just because RAM meets the minimum listed criteria does not mean that it will necessarily function as intended in a particular Mac. When buying memory, be sure to buy from a quality vendor that has tested their RAM with your Mac to ensure compatibility.
Direct links to Apple instruction manuals (PDF) with official memory installation instructions and instructional videos and compatible memory for sale from site sponsor Other World Computing have been integrated into the below chart for your convenience.
Power Mac G3 | SDRAM Type | Slots | Max |
PC66* | 3 | 768 MB** | |
PC66* | 3 | 768 MB** | |
PC66* | 3 | 768 MB** | |
Instructions From |
| ||
PC66 | 3 | 768 MB†† | |
PC66 | 3 | 768 MB†† | |
PC66 | 3 | 768 MB | |
PC66 | 3 | 768 MB | |
Instructions From |
| ||
PC66* | 3 | 768 MB†† | |
PC66* | 3 | 768 MB†† | |
Instructions From |
| ||
PC100† | 4 | 1.0 GB | |
PC100† | 4 | 1.0 GB | |
PC100† | 4 | 1.0 GB | |
PC100† | 4 | 1.0 GB | |
Instructions From |
* These models support low profile 10 ns PC66 168-pin SDRAM.
† The "Blue & White" Power Mac G3 models officially support PC100 memory, but PC133 memory is backwards compatible and may be used as well. PC133 memory may be easier to find as well.
** Apple officially reports that the maximum memory in these models is 192 MB, but third-parties successfully have upgraded them to 768 MB of RAM.
†† Apple officially reports that the maximum memory in these models is 384 MB, but third-parties successfully have upgraded them to 768 MB of RAM.
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