iMac 333Mhz memory and slots

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iMac 333Mhz memory and slots

I recently pick up an iMac 333MHz (tray loading)with 64 mb of memory and would eventually like to get it to OSX.

I have located the main memory slot according to the instructions, but understand that their is a second memory slot. I have been unable to locate it or find instructions on how to add additional memory to the second slot. I understand that the 333MHz iMac can have 512mb (2 x 256mb). If anyone has instructions on how to access the second memory slot and also a resource to get memory for the iMac I would appreciate it.

iMac 333MHz CRT, Mac OS 9.1.x

Posted on Sep 12, 2007 7:43 AM

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Answer 1

Sep 12, 2007 8:55 AM in response to iMacnewbee

WELCOME...

as for OSX:
If you have a hard drive over 8 GB in size, +you must partition it+, and the partition containing OS X must be completely within the first 8 GB of space or you will not be able to run OS X.
If you are creating the partition within OS X, it must be 7.45 GB or smaller as reported by Disk Utility...

As for RAM:
RAM: 32 MB, expandable to 384 MB using SO-DIMM SDRAM (3.3V, unbuffered, 64-bit, 144-pin, 100 MHz or faster, 10ns) in two DIMM sockets (256 MB on top, 128 MB on bottom), top DIMM socket accepts 2" DIMM, bottom socket takes 1.5" DIMM

The exact amount a Rev. A-D iMac *can be upgraded* varies from unit to unit. Feld reports of some models accepting 256 MB modules in both memory socket and reaching 512 MB - and other reports of early iMacs that *won't work* at all with 256 MB modules.

See Here:
http://lowendmac.com/imacs/imac-d.shtml

Tech specs:
http://support.apple.com/specs/imac/iMac333MHz.html

As for memory:
http://www.edgetechcorp.com/memory/upgrade.asp?cid=17772

Thanks,
den
.
.
.

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Answer 2

iMacnewbee Author

Level 1

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Sep 12, 2007 9:45 AM in response to artlover50

Thanks for the info, I appreciate the help. I believe that it is a Rev. D iMac. But I will need to check that out and confrim it. Currently it only has a 6 GB hard drive in it. From the tag on the side it has the following info:

SO#7000298512000010
Serial#XA9290YQGVK
imac/333mhz/64mb/sdram/6v/6gb/hb/cd/mdm/blueberry

My first goal is to get the memory upgraded to the maximum amount before I invest into another hard drive. I also want to do it at a reasonable cost. I would like to use this as a music storage device and eventually put a 128 GB hard drive in it, but first things first.

Thanks again.

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Answer 3

Sep 12, 2007 1:39 PM in response to iMacnewbee

I'm not sure if your actual question was answered... The second memory slot is on the bottom side of the CPU card, which sits on top of the motherboard. You have remove the "cage" around the CPU card and then carefully detach the CPU card from the motherboard to get at it. There is one screw that holds the cage in place.

OWC has a page that lists their available upgrades based on Mac model.

http://eshop.macsales.com/MyOWC/index.cfm?StartOver=1&TI=5006

I find their memory prices to be excellent. Hard drives prices are OK, but can often be found "on special" at other vendors using dealmac.com.

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Answer 4

rccharles

Level 6

13,037 points

Sep 12, 2007 9:06 PM in response to iMacnewbee

I recently pick up an iMac 333MHz (tray loading)with 64 mb of memory and would eventually like to get it to OSX.

Note... The lower slot requires low profile memory. You can put the low profile memory in the upper slot if you want.

From what I read, most people feel the 333 machine can take 512meg of memory.

Be sure to update the firmware before moving to Mac OS X 10.2 or 10.3.

You should verify that you have the latest firmware, before installing new software. See the system profiler for details. What firmware do you need?
http://docs.info.apple.com/article.html?artnum=86117

Mac OS X takes about 4gig of harddrive space.

This will require a minimum of 128meg of ram. You may put 512meg of ram in this machine. There are two memory slots. One must be Low Profile memory. Be sure you can return your memory cards. iMac memory cards are finicky.
http://eshop.macsales.com/shop/memory/iMac-G3-G4/

All the tray loading iMac g3's, models a-d, are constructed the same.

Here is a good disassembly page:
http://www.macopz.com/columns/imacrepair/disassembly.html

The second article in this series has information on replacing the battery:
http://discussions.apple.com/thread.jspa?messageID=2584291

The tray loading iMac requires the boot partition to be within 8gig. Since there are hidden partition before the first visible partition, people recommend that you make the first visible partition 7.5 gig to 7.9gig. The machines support upto a 128gig Parallel ATA drive.

You should be able to use Unix symbolic links to 'move' some directory like /Users to the second visible partition.

Robert

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