On 2012/02/12 08:24, QuoVadis so eloquently wrote:
Hello Tina,
Does the USB2.0 version use DDR memory, instead of SD-RAM of the USB
1.1 version? If so, then the topic starter has more options indeed.
I'm not sure how pricey a 1GB DDR SO-DIMM is going to be..
Greetings,
Eelco.
Thanks for the question, looking closer at the G4 iMacs I see that it isn't just
the USB 2 models that have an actual 2GB limit. According to Mactracker:
1. The original G4 iMac, was produced Jan 02 - Feb 03. It uses (1) PC133 144 pin
SO-DIMM and (1) PC133 168 pin SDRAM for a maximum of 1GB RAM total.
2. Was produced Feb 03 - Sep 03. The 15" 800MHz model uses the same RAM as V1
above, with the same 1GB limit.
3. Was also produced Feb 03 - Sep 03. The 17" 1GHz model, uses (1) PC2100 200 pin
SO-DIMM and (1) PC-2100 184 pin SDRAM. Apple lists the memory limit at 1GB but the
actual limit is 2GB.
4. The USB 2 model was produced Sep 03 (Nov 03 for the 20" model) - Jul 04. It
uses (1) PC2700 200 pin SO-DIMM and (1) PC-2700 184 pin SDRAM.
In case anyone is wondering why Apple listed some G4 iMacs at 1GB maximum but in
reality 2GB is the maximum I think originally each type of RAM was only available
up to 512MB per stick for the 1GB limit, but in time higher density 1GB sticks
became available and Apple didn't change their specs, maybe to avoid support
liability. Then again I could be completely wrong. ;-)
In all of the above the SO-DIMM is the user (easily) accessible memory and the
SDRAM is the factory (know how to replace thermal paste) memory. These iMacs do
not support DDR, and I believe that the memory sticks do not have to be of the
same capacity.
Tina
--
Acceleron: HP Presario 2.8GHz Celeron D 2GB RAM Discrete graphics XP Pro
Luxo Jr: iMac 20" USB 2 1.25GHz G4 2GB RAM GeForceFX5200 Ultra 64MB VRAM 10.4.11
Worm: PowerBook G4 15" HR-DLSD 1.67GHz G4 2GB RAM Radeon 9700 128MB VRAM 10.5.8
Quadrophenia: Mac Pro Mid-2010 2.8 GHz QC 6 GB RAM Radeon HD 5770 1GB VRAM
10.6.8
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