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
233 Desktop	PC66*	3	768 MB**
266 Desktop	PC66*	3	768 MB**
300 Desktop	PC66*	3	768 MB**
Compatible Memory - OWC	Instructions From	Apple
233 Minitower	PC66	3	768 MB††
266 Minitower	PC66	3	768 MB††
300 Minitower	PC66	3	768 MB
333 Minitower	PC66	3	768 MB
Compatible Memory - OWC	Instructions From	Apple
233 All-in-One	PC66*	3	768 MB††
266 All-in-One	PC66*	3	768 MB††
Compatible Memory - OWC	Instructions From	Apple
300 (Blue & White)	PC100†	4	1.0 GB
350 (Blue & White)	PC100†	4	1.0 GB
400 (Blue & White)	PC100†	4	1.0 GB
450 (Blue & White)	PC100†	4	1.0 GB
Compatible Memory - OWC	Instructions From	Apple	OWC

* 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.

Site sponsor Operator Headgap Systems also sells memory compatible with a variety of Power Mac G3 systems.