The Apple Power Mac G5 Quad 2.5GHz DDR2 uses DDR2 DIMM ECC PC2-6400 800MHz 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 DDR2 DIMM ECC PC2-6400 800MHz
Base Memory
Upgrade Slots 8
Maximum Memory 16GB
Maximum Module Size 2GB
CPU & Chipset ~
Bus Architecture ~
Part Number 541EC7
800MHz 240pin CL7 ECC
In Stock
$15.99
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Part Number 542EC7
800MHz 240pin CL7 ECC
In Stock
$21.99
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Part Number 541EC7H
800MHz 240pin CL7 ECC
In Stock
$24.99
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Part Number 541EC7-2
800MHz 240pin CL7 ECC
In Stock
$30.99
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Part Number 542EC7H
800MHz 240pin CL7 ECC
In Stock
$34.99
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Part Number 542EC5-2
800MHz 240pin CL5 ECC
In Stock
$43.99
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Part Number 542EC7-2
800MHz 240pin CL7 ECC
In Stock
$43.99
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Part Number 54.2EC7
800MHz 240pin CL7 ECC
In Stock
$46.99
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Part Number 54.5EC7
800MHz 240pin CL7 ECC
In Stock
$46.99
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Part Number 541EC7-2H
800MHz 240pin CL7 ECC
In Stock
$49.99
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Part Number 541EC7-4
800MHz 240pin CL7 ECC
In Stock
$61.99
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Part Number 542EC5-2H
800MHz 240pin CL5 ECC
In Stock
$69.99
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Part Number 542EC7-2H
800MHz 240pin CL7 ECC
In Stock
$69.99
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Part Number 54.2EC7H
800MHz 240pin CL7 ECC
In Stock
$74.99
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Part Number 54.5EC7H
800MHz 240pin CL7 ECC
In Stock
$74.99
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Part Number 542EC7-4
800MHz 240pin CL7 ECC
In Stock
$86.99
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Part Number 54.2EC7-2
800MHz 240pin CL7 ECC
In Stock
$92.99
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Part Number 54.5EC7-2
800MHz 240pin CL7 ECC
In Stock
$92.99
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Part Number 541EC7-4H
800MHz 240pin CL7 ECC
In Stock
$99.99
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Part Number 542EC7-4H
800MHz 240pin CL7 ECC
In Stock
$139.99
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Part Number 54.2EC7-2H
800MHz 240pin CL7 ECC
In Stock
$149.99
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Part Number 54.5EC7-2H
800MHz 240pin CL7 ECC
In Stock
$149.99
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Part Number 54.5EC7-4
800MHz 240pin CL7 ECC
In Stock
$185.99
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Part Number 54.5EC7-4H
800MHz 240pin CL7 ECC
In Stock
$299.99
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Part Number 542EC7-4
800MHz 240pin CL7 ECC
In Stock
$86.99
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Part Number 542EC7-4H
800MHz 240pin CL7 ECC
In Stock
$139.99
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Part Number 542EC5-2
800MHz 240pin CL5 ECC
In Stock
$43.99
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Part Number 542EC7-2
800MHz 240pin CL7 ECC
In Stock
$43.99
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Part Number 541EC7-4
800MHz 240pin CL7 ECC
In Stock
$61.99
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Part Number 542EC5-2H
800MHz 240pin CL5 ECC
In Stock
$69.99
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Part Number 542EC7-2H
800MHz 240pin CL7 ECC
In Stock
$69.99
View Product
Part Number 541EC7-4H
800MHz 240pin CL7 ECC
In Stock
$99.99
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Part Number 542EC7
800MHz 240pin CL7 ECC
In Stock
$21.99
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Part Number 541EC7-2
800MHz 240pin CL7 ECC
In Stock
$30.99
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Part Number 542EC7H
800MHz 240pin CL7 ECC
In Stock
$34.99
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Part Number 541EC7-2H
800MHz 240pin CL7 ECC
In Stock
$49.99
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Part Number 54.5EC7-4
800MHz 240pin CL7 ECC
In Stock
$185.99
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Part Number 54.5EC7-4H
800MHz 240pin CL7 ECC
In Stock
$299.99
View Product
Part Number 541EC7
800MHz 240pin CL7 ECC
In Stock
$15.99
View Product
Part Number 541EC7H
800MHz 240pin CL7 ECC
In Stock
$24.99
View Product
Part Number 54.5EC7-2
800MHz 240pin CL7 ECC
In Stock
$92.99
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Part Number 54.5EC7-2H
800MHz 240pin CL7 ECC
In Stock
$149.99
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Part Number 54.5EC7
800MHz 240pin CL7 ECC
In Stock
$46.99
View Product
Part Number 54.5EC7H
800MHz 240pin CL7 ECC
In Stock
$74.99
View Product
Part Number 54.2EC7-2
800MHz 240pin CL7 ECC
In Stock
$92.99
View Product
Part Number 54.2EC7-2H
800MHz 240pin CL7 ECC
In Stock
$149.99
View Product
Part Number 54.2EC7
800MHz 240pin CL7 ECC
In Stock
$46.99
View Product
Part Number 54.2EC7H
800MHz 240pin CL7 ECC
In Stock
$74.99
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
CT1015592 4GB Kit of 2 2GB DDR2 PC2-6400 800MHz ECC DIMM Crucial 542EC5-2