The Sun Ultra 20 (AMD Opteron 148) uses DDR DIMM ECC PC3200 400MHz 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 DDR DIMM ECC PC3200 400MHz
Base Memory
Upgrade Slots
Maximum Memory ~
Maximum Module Size
CPU & Chipset ~
Bus Architecture ~
Part Number 33.1EC3
400MHz 184pin CL3 ECC
In Stock
$18.99
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Part Number 33.1EC3H
400MHz 184pin CL3 ECC
In Stock
$29.99
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Part Number 33.2EC3
400MHz 184pin CL3 ECC
In Stock
$34.99
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Part Number 331EC3
400MHz 184pin CL3 ECC
In Stock
$38.99
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Part Number 33.5EC3
400MHz 184pin CL3 ECC
In Stock
$40.99
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Part Number 33.2EC3H
400MHz 184pin CL3 ECC
In Stock
$54.99
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Part Number 331EC3H
400MHz 184pin CL3 ECC
In Stock
$62.99
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Part Number 33.5EC3H
400MHz 184pin CL3 ECC
In Stock
$64.99
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Part Number 33.2EC3-2
400MHz 184pin CL3 ECC
In Stock
$68.99
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Part Number 331EC3-2
400MHz 184pin CL3 ECC
In Stock
$77.99
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Part Number 33.5EC3-2
400MHz 184pin CL3 ECC
In Stock
$80.99
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Part Number 33.2EC3-2H
400MHz 184pin CL3 ECC
In Stock
$109.99
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Part Number 331EC3-2H
400MHz 184pin CL3 ECC
In Stock
$124.99
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Part Number 33.5EC3-2H
400MHz 184pin CL3 ECC
In Stock
$129.99
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Part Number 33.2EC3-4
400MHz 184pin CL3 ECC
In Stock
$136.99
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Part Number 331EC3-4
400MHz 184pin CL3 ECC
In Stock
$154.99
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Part Number 33.2EC3-4H
400MHz 184pin CL3 ECC
In Stock
$219.99
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Part Number 331EC3-4H
400MHz 184pin CL3 ECC
In Stock
$249.99
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Part Number 331EC3-4
400MHz 184pin CL3 ECC
In Stock
$154.99
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Part Number 331EC3-4H
400MHz 184pin CL3 ECC
In Stock
$249.99
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Part Number 331EC3-2
400MHz 184pin CL3 ECC
In Stock
$77.99
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Part Number 331EC3-2H
400MHz 184pin CL3 ECC
In Stock
$124.99
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Part Number 331EC3
400MHz 184pin CL3 ECC
In Stock
$38.99
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Part Number 331EC3H
400MHz 184pin CL3 ECC
In Stock
$62.99
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Part Number 33.5EC3-2
400MHz 184pin CL3 ECC
In Stock
$80.99
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Part Number 33.5EC3-2H
400MHz 184pin CL3 ECC
In Stock
$129.99
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Part Number 33.2EC3-4
400MHz 184pin CL3 ECC
In Stock
$136.99
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Part Number 33.2EC3-4H
400MHz 184pin CL3 ECC
In Stock
$219.99
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Part Number 33.5EC3
400MHz 184pin CL3 ECC
In Stock
$40.99
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Part Number 33.5EC3H
400MHz 184pin CL3 ECC
In Stock
$64.99
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Part Number 33.2EC3-2
400MHz 184pin CL3 ECC
In Stock
$68.99
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Part Number 33.2EC3-2H
400MHz 184pin CL3 ECC
In Stock
$109.99
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Part Number 33.2EC3
400MHz 184pin CL3 ECC
In Stock
$34.99
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Part Number 33.2EC3H
400MHz 184pin CL3 ECC
In Stock
$54.99
View Product
Part Number 33.1EC3
400MHz 184pin CL3 ECC
In Stock
$18.99
View Product
Part Number 33.1EC3H
400MHz 184pin CL3 ECC
In Stock
$29.99
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
CT482838 2GB Kit of 2 1GB DDR PC3200 400MHz ECC DIMM Crucial 331EC3-2