The Apple iMac G4 1.25Ghz 20" Flat Panel USB 2.0 uses memory upgrades as listed in the detailed specifications below. All memory and other upgrades compatible with this system are listed on this page.

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Memory Type
Base Memory 256 MB
Upgrade Slots 2*
Maximum Memory 2 GB*
Maximum Module Size
CPU & Chipset 1.25 GHz PowerPC 7445 (G4) 1
Bus Architecture ~
Manufacturer Part Numbers
  • M9290LL/A
  • N/A (EMC N/A)
  • PowerMac6,3

Released On: November 18, 2003. Discontinued On: July 1, 2004

Part Number 42.1C3
333MHz 200pin CL3
Call to Order
$7.99
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Part Number 42.2C3
333MHz 200pin CL3
In Stock
$10.99
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Part Number 42.1C3H
333MHz 200pin CL3
Call to Order
$12.99
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Part Number 42.5C3
333MHz 200pin CL3
In Stock
$12.99
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Part Number 42.2C3H
333MHz 200pin CL3
In Stock
$17.99
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Part Number 42.5C3H
333MHz 200pin CL3
In Stock
$19.99
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Part Number 42.5C3
333MHz 200pin CL3
In Stock
$12.99
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Part Number 42.5C3H
333MHz 200pin CL3
In Stock
$19.99
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Part Number 42.2C3
333MHz 200pin CL3
In Stock
$10.99
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Part Number 42.2C3H
333MHz 200pin CL3
In Stock
$17.99
View Product
Part Number 42.1C3
333MHz 200pin CL3
Call to Order
$7.99
View Product
Part Number 42.1C3H
333MHz 200pin CL3
Call to Order
$12.99
View Product

Upgrade References

The table below are references to other manufacturer part numbers which are specific to this device, have identical specifications to our components. This information is made available for your reference.
Part# Source References
No Part Information Currently Available