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Micromac's 168-pin 64-bit SDRAM DIMM for G3 Power Mac models provides best compatibility and great pricing.

Available for:

PowerMac G3 All in One/233
PowerMac G3 All in One/266
PowerMac G3 DT/233
PowerMac G3 DT/266
PowerMac G3 MT/233
PowerMac G3 MT/266
PowerMac G3 MT/300


DIMM Selection

If you do not find your particular Mac model listed here go to the 168-pin DIMM Selection Page to find the appropriate 168-pin DIMM type for YOUR Mac.



168-pin SDRAM Memory DIMM

The 168-pin 64-bit SDRAM DIMM is required for the G3-line of PowerMac computers.

These DIMMs come in 8MB, 16MB, 32MB, 64MB or 128MB sizes.

Typically they are installed individually, although in some selected Mac models they may be installed in pairs to allow interleaving to achieve an overall faster memory access.

MicroMac 168-pin SDRAM Memory DIMM Benefits:
Checkmark Guaranteed compatible for your Macintosh model
Checkmark Free technical support for memory installation questions
Checkmark Economical

Memory is like Money: If you have owned a computer for a number of years, you know it is a true statement: you always can use more memory. With today's powerful system software and the newest generation application programs you need more memory, lots of it in fact, to run your computer efficiently.
   Depending on your applications and work habits, you may want to upgrade your Mac to 36MB or 64MB, or maybe more than 128MB, and in some cases even beyond 512MB of RAM.

What does it all mean?: 168-pin 64-bit 5V 2K-refresh EDO Memory DIMM

  • 168-pin means that the memory module has 168 connections to connect to the DIMM socket on the logic board. Part of the 168 connections are the 64 data bits that are transferred to and from the memory module. Other connections are the address lines and the power connections.
  • 64-bit means that the memory module features a 64-bit data path, thus a single memory access can transfer up to 64 bits or 8 bytes.
  • 5V means that the chips on the DIMM operate with 5V operating voltage, as opposed to 3.3V, another common, but incompatible DIMM operating voltage.
  • 2K-refresh refers to the total number of refresh cycles required by the memory chip to maintain data integrity. Some incompatible memory chips are offered with 4K refresh, but some Mac models require 2K-refresh or less to function reliably.
  • EDO means Extended Data Output, a memory access mode to increase the memory access speed in certain Mac models.
  • DIMM means Dual In-line Memory Module. This term refers to the two-sided connection method of the memory module to the connector on the logic board.

Choose with confidence: In order to successfully upgrade the memory of your Mac, there is no need to understand all these terms in detail. Simply verify that your Mac model is listed in the above table and select the part number for the memory size (amount of MB) that you desire from the product selection table on the bottom of this page.

Why should the DIMMs on some Power Macintosh models be installed in pairs?: The Power Macintosh 7300, 7500, 7600, 8500, 8600, 9500, and 9600 series computers support memory interleaving. Although you can install DIMMs one at a time, you can get increased performance by installing them in pairs.

System Requirements, Memory configurations, and acceptable SIMM Sizes:

Mac Models

Base Memory

(soldered onto logic board)

up to two
DIMMs of the following sizes

up to eight
or up to four
interleaved pairs of 168-pin

up to 12
or up to six
interleaved pairs of 168-pin

Maximum amount of RAM

PowerMac G3 All in One/233
PowerMac G3 All in One/266
PowerMac G3 DT/233
PowerMac G3 DT/266
PowerMac G3 MT/233
PowerMac G3 MT/266
PowerMac G3 MT/300




Time Requirement: Depending on your Mac Model the installation will take between 5 minutes and 15 minutes.

MicroMac Delivers: 168-pin 64-bit SDRAM DIMM


MicroMac #


Price in US$

Memory for Logic Boards

8MB 168-pin 64-bit G3-SDRAM DIMM, 60ns




16MB 168-pin 64-bit G3-SDRAM DIMM, 60ns




32MB 168-pin 64-bit G3-SDRAM DIMM, 60ns




64MB 168-pin 64-bit G3-SDRAMDIMM, 60ns




128MB 168-pin 64-bit G3-SDRAM DIMM, 60ns




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This page was last modified on May 18, 1998