IMac 233 RAM upgrade-wisdom & advice needed

Hi-
I have an iMac 233 now running on OS9.2.2., it is a bondi, tray-load-CD-drive, Video memory is 6MB according to system profile. (I think it may be a Rev A but I'm still a little shaky on determining that one). I've been it's only owner since it was new (circa 1997-1998 who really remembers that far back??).
I have 32MB in the bottom memory slot, and 128MB in the top spot (I added it just after I got the computer). So it has 160 MB memory now.
I'm running into memory issues and I want to max out the memory that it can hold.
Some websites say it will take 512 MB. How so? Two 256MB chips? Other sources say I'm limited to 160 MB.
Some memory websites say you'll only know if the larger memory chip works if you try it, because of where your board was made.
Should I try putting a 256MB memory chip in the bottom slot? I understand it is under the top one, and I've been inside the guts before so I'm not intimidated by doing this myself.
Has anyone out there had any success doing something like this?
And are the top and bottom chips different sizes so that one may not fit into the other?
Also, is there anything I will need to reset or worry about when I change the internal 1/2 AA battery? My clock is losing a few minutes every week. I've got the new battery but want to know what to expect popping the old one out.
Any help would really be appreciated. Thanks!

I ran 512MB in my Bondi Blue for years. The lower slot is low profile (1.5" I believe), so you have to get a low profile DIMM for that slot. You can get a 512MB kit for it from www.datamem.com, which is 2X256MB DIMMs. Either one will be low profile, or both will be (since the top slot can fit either low profile or regular size). I've spoken to people who claim to have put 2X512 MB in their Bondis.
Replacing the battery is just a matter of taking the old one out and putting the new one in.

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According to the published specs here:
https://www.apple.com/imac-with-retina/specs/
Apple wrote:
8GB (two 4GB) of 1600MHz DDR3 memory; four SO-DIMM slots, user accessible
Configurable to 16GB or 32GB.
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https://www.ifixit.com/Guide/iMac+Intel+27-Inch+EMC+2639+RAM+Replacement/20249

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Unbuffered
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Computer model: Power Mac G4
Type of CPU: PowerPC G4 (11.3)
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O.k., dear Psycho Biotch,
As stated before (...and lately the programs have been running slower and slower...), it is very likely that your current internal Hard Disk (which, at the most, is an Ultra ATA, 60GB in capacity) has reached is near to full storage capacity.
Under OSX you should be aware that once the hard disk has reached 80-85% of its full capacity in data stored on it, it is time to either move some old files onto external media (such as CD-Rs) in order to free some additional space, or to increase your data storage capacity.
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The IDE bus, in fact, allows only small "data packages" to be exchanged on the same bus, forcing the disks' hardware to continuos data seeks and retrivals. See this Storage Acceleration Guide for more details about what I am trying to explain you.
If you use applications such Final Cut Pro and Flash, it is likely you are handling files which - on average - are of pretty large dimensions.
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Short term solution
My idea is to swap your internal Ultra ATA hard disk with a more modern one, 120GB in capacity (as it is the maximum capacity your internal IDE controller will allow you to format), and to place your current hard disk into an external FireWire case.
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* - You will still be able to start-up your Mac from your old hard disk placed in the FireWire case and connected to one of your Mac's FireWire ports.
* - Once you'll have installed OSX in the new drive and moved all your applications and data to it, you will be able to use your older drive in the FireWire box as your main backup drive, where you can hold a copy of all your pretious projects, etc.
* - Whatever final set-up you will ahve in the future, you will always find a good use for your older hard disk placed in the FireWire external box and even when, or if, it will eventually die on you, you can still use the box to place another har disk in it. So, your money will be in any event wisely spent.
Cons:
* - Maybe, having to deal with an additional external case, it will be cause of excessive electrical wireing around your working desk, making it look more "un-tidy".
* - You will need to find an extra power plug on your strip.
* - If you use an UPS system (like any of these), you will need to figure out wheather it can protect your new external addition or not, without the need to get a more powerful one.
* - You will need to instal the old hard drive on your own, if you don't want to spend the extra cash for someone else to do it for you (however, the instructions are easy to follow).
Here are a couple of examples with indicative costs:
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* Apple's CIP ATA Hard Drive instructions - Same as above but Adobe Reader printable download.
* OWC FireWire Assembly Manual - Maybe the model you might go for in the end, could differ from the one depicted in the above instructions, but the main activities are the same.
Let me know if you like the above solution.
In another post, I'll explain you the second solution I have in mind.
Later.
Costa

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Message was edited by: MGW

Why is aperture crashing on my iMAC after Ram upgrade?

I have recently upgraded the Ram on my Apple iMac and everything seems to be working fine except Aperture, which keeps crashing. Should I reinstall it? If so how? It is showing as installed on my purchases and the box is greyed out.

Should I reinstall it? If so how?
Before reinstalling, check, if it is a system wide issue and try to narrow down the problem.
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Is Aperture still crashing, when working from a different user account?
If Aperture is working fine in any of these situations, the problem is with your Aperture library or settings /installations in your user account, and reinstalling Aperure should not be necessary.
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Hello everyone,
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Cheers

+1 what Ralph said. Get the baseline $1799 15", and upgrade it yourself. If you're doing audio production, upgrade the display to 1680x1050 for $100. Then, you can upgrade the RAM and SSD yourself down the road, for much cheaper than Apple's prices. That 2.3GHz i7 will be plenty for audio production.
No audio production software, besides probably garageband, supports the retina display yet. You'd be effectively using a 1440x900 display. Better than your 13", but not by much.

IMac 233 1998, upgraded to OSX, brownout, now won't start up.

Hello. Our bicycle collective received a gift of a 1998 Blue iMac, I believe it's the 233 MHz, not sure if it's regular or 233/B.
It came with OS 8.5. Most unwisely someone decided to install OSX 10.1.5 without researching it beforehand. It ran the OSX for a while until a circuit breaker lost power. Since then the iMac won't start from either the keyboard power button or the computer power button.
I believe it came with 4 gigs of hard drive space, is this enough for OSX? Should we get an external USB hard drive?
I'll be back there tonight to check it out, I found out about the reset button and I'll try that.
Does anyone have any suggestions.
The specs on the iMac when we got it:
OS 8.5
Two memory slots currently 32+128 + 160 megs memory
CD only tray
Production date 11/28/1998.
Also has a built in modem (I'm assuming a standard 56k modem hard wired - can this be converted to wifi?)
2 (two) USB slots and a firewire(?)some other small square input slot.
Thanks,
Arthur

Hi,
First where are you located?
Then you should go here for info on your machine:
http://www.lowendmac.com/imacs/index.shtml
depending on if it's a rev A or B. I think you can tell by looking at the graphics chip.
As to the startup issue:
"Logic Board Battery
The battery on the logic board controls the stored system settings,
such as date and time. It is important to note that the battery does
not affect power at startup."
but then in manuals for the slot loaders they said to check the battery if there were dead at start up issues. Hee hee.
Also:
"The Cuda Chip
The Cuda is a microcontroller chip. Its function is to:
• Turn system power on and off.
• Manage system resets from various commands.
• Maintain parameter RAM (PRAM).
• Manage the real-time clock.
Many system problems can be resolved by resetting the Cuda chip
(see the Symptom/Cure tables for examples). Press the Cuda
reset button on the logic board to reset the Cuda chip. (The Cuda
reset button is located on the back edge of the logic board between
the modem port and the processor module. Refer to the Logic Board
Diagram in the Basics chapter for location information.) If you
continue to experience system problems, refer to “Resetting the
Logic Board” later in this chapter.
Troubleshooting General/ Resetting the Logic Board - 11
Resetting the Logic Board
Resetting the logic board can resolve many system problems (see
the Symptom/Cure tables for examples). Whenever you have a
unit that fails to power up, you should follow this procedure
before replacing any modules.
1. Unplug the computer.
2. Disconnect the cable that runs from the power supply to the
power filter board on the bottom side of the logic board/mass
storage chassis.
3. Press the Power On button on the front of the unit.
4. Remove the logic board/mass storage chassis from the unit.
5. Remove the battery from the logic board.
6. Wait at least 10 minutes before replacing the battery.
7. Make sure the battery is installed in the correct +/-
direction.
8. Reassemble the computer and test the unit.
Note:
This procedure resets the computer’s PRAM. Be sure to
check the computer’s time/date and other system parameter
settings afterwards."
eMail me for complete info.
Richard

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How much can a G4 be upgraded to, is it 1GB only?

Hi Hamper,
Just to further add to Steve's reply, there were seven different releases of the G4 iMac:
1. iMac (Flat Panel) aka Tessera, P80 - Introduced Jan 2002, Discontinued Feb 2003 - Max RAM = 1GB
2. iMac (17-inch Flat Panel) aka P79 - Introduced July 2002, Discontinued Feb 2003 - Max RAM = 1GB
3. iMac (15-inch Early 2003) - Introduced Feb 2003, Discontinued Sep 2003 - Max RAM = 1GB
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5. iMac (15-inch USB 2.0) aka Horizon, Q268 - Introduced Sep 2003, Discontinued July 2004 - Max RAM = 2GB
6. iMac (17-inch USB 2.0) aka Horizon, Q26C - Introduced Sep 2003, Discontinued July 2004 - Max RAM = 2GB
7. iMac (20-inch USB 2.0) - Introduced Nov 2003, Discontinued July 2004 - Max RAM = 2GB
All models had one factory installed module (earlier models had 512MB factory installed, later models had a 1GB module factory installed) and one user accessible module.
What you must understand is that Apple, and indeed any computer manufacturer, can only specify maximum RAM specifications with the memory modules that were publicly available at the time of release (or when the specs were written). Since they were released, larger memory modules have become more widely available (not to mention cheaper). You most certainly can install a 1GB or 2GB module in your iMac and it will be recognised.
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http://discussions.apple.com/category.jspa?categoryID=137
Kryten

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Hi Moe, it can indeed hold 32GB...
Standard RAM:
4 GB
Maximum RAM:
32 GB*
Details:
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http://www.everymac.com/systems/apple/imac/specs/imac-core-i5-3.1-27-inch-alumin um-mid-2011-thunderbolt-specs.html
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In the Memory tab of Activity Monitor, are there a lot of Pageouts?

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