The IBM/Lenovo eServer xSeries BladeCenter JS20 (8842-42x, 4Tx, Rxx) uses DDR DIMM ECC REG PC2700 333MHz, ECC PC2700 333MHz 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 REG PC2700 333MHz, ECC PC2700 333MHz
Base Memory 512MB (Removable)
Upgrade Slots 4 Sockets (2 banks of 2)
Maximum Memory 8GB
Maximum Module Size 2GB
CPU & Chipset IBM PowerPC 970
Bus Architecture PCI
Manufacturer Part Numbers
  • 8842-42x
  • 8842-4Tx
  • 8842-Rxx
Part Number 32.1EC3
333MHz 184pin CL3 ECC
In Stock
$23.99
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Part Number 321ERC2/5
333MHz 184pin CL2.5 Registered ECC
In Stock
$23.99
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Part Number 321ERC3
333MHz 184pin CL3 Registered ECC
In Stock
$23.99
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Part Number 32.1ERC3
333MHz 184pin CL3 Registered ECC
In Stock
$30.99
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Part Number 321ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$30.99
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Part Number 32.2EC3
333MHz 184pin CL3 ECC
Call to Order
$34.99
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Part Number 32.1ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$35.99
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Part Number 32.1EC3H
333MHz 184pin CL3 ECC
In Stock
$37.99
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Part Number 321ERC2/5H
333MHz 184pin CL2.5 Registered ECC
In Stock
$37.99
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Part Number 321ERC3H
333MHz 184pin CL3 Registered ECC
In Stock
$37.99
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Part Number 321EC3
333MHz 184pin CL3 ECC
In Stock
$38.99
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Part Number 32.5EC3
333MHz 184pin CL3 ECC
Call to Order
$40.99
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Part Number 32.5ERC3
333MHz 184pin CL3 Registered ECC
Call to Order
$40.99
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Part Number 321ERC3-2
333MHz 184pin CL3 Registered ECC
In Stock
$46.99
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Part Number 322ERC3
333MHz 184pin CL3 Registered ECC
In Stock
$46.99
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Part Number 32.1ERC3H
333MHz 184pin CL3 Registered ECC
In Stock
$49.99
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Part Number 32.2ERC3
333MHz 184pin CL3 Registered ECC
In Stock
$49.99
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Part Number 32.2ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$49.99
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Part Number 321ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$49.99
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Part Number 32.2EC3H
333MHz 184pin CL3 ECC
Call to Order
$54.99
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Part Number 322ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$54.99
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Part Number 32.5ERLPC2/5
333MHz 184pin CL2.5 Registered Low Profile ECC
In Stock
$55.99
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Part Number 32.5ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$55.99
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Part Number 32.1ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$57.99
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Part Number 321ERLPC3-2
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$61.99
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Part Number 321EC3H
333MHz 184pin CL3 ECC
In Stock
$62.99
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Part Number 32.5EC3H
333MHz 184pin CL3 ECC
Call to Order
$64.99
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Part Number 32.5ERC3H
333MHz 184pin CL3 Registered ECC
Call to Order
$64.99
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Part Number 32.2EC3-2
333MHz 184pin CL3 ECC
Call to Order
$68.99
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Part Number 321ERC3-2H
333MHz 184pin CL3 Registered ECC
In Stock
$74.99
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Part Number 322ERC3H
333MHz 184pin CL3 Registered ECC
In Stock
$74.99
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Part Number 321EC3-2
333MHz 184pin CL3 ECC
In Stock
$77.99
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Part Number 32.2ERC3H
333MHz 184pin CL3 Registered ECC
In Stock
$79.99
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Part Number 32.2ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$79.99
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Part Number 32.5EC3-2
333MHz 184pin CL3 ECC
Call to Order
$80.99
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Part Number 32.5ERC3-2
333MHz 184pin CL3 Registered ECC
Call to Order
$80.99
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Part Number 322ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$87.99
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Part Number 32.5ERLPC2/5H
333MHz 184pin CL2.5 Registered Low Profile ECC
In Stock
$89.99
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Part Number 32.5ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$89.99
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Part Number 321ERC3-4
333MHz 184pin CL3 Registered ECC
In Stock
$92.99
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Part Number 32.2ERC3-2
333MHz 184pin CL3 Registered ECC
In Stock
$99.99
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Part Number 32.2ERLPC3-2
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$99.99
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Part Number 321ERLPC3-2H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$99.99
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Part Number 32.2EC3-2H
333MHz 184pin CL3 ECC
Call to Order
$109.99
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Part Number 32.5ERLPC3-2
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$111.99
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Part Number 321ERLPC3-4
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$123.99
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Part Number 321EC3-2H
333MHz 184pin CL3 ECC
In Stock
$124.99
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Part Number 32.5EC3-2H
333MHz 184pin CL3 ECC
Call to Order
$129.99
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Part Number 32.5ERC3-2H
333MHz 184pin CL3 Registered ECC
Call to Order
$129.99
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Part Number 32.2EC3-4
333MHz 184pin CL3 ECC
Call to Order
$136.99
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Part Number 321ERC3-4H
333MHz 184pin CL3 Registered ECC
In Stock
$149.99
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Part Number 321EC3-4
333MHz 184pin CL3 ECC
In Stock
$154.99
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Part Number 322EC3
333MHz 184pin CL3 ECC
In Stock
$154.99
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Part Number 32.2ERC3-2H
333MHz 184pin CL3 Registered ECC
In Stock
$159.99
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Part Number 32.2ERLPC3-2H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$159.99
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Part Number 32.5ERLPC3-2H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$179.99
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Part Number 32.2ERC3-4
333MHz 184pin CL3 Registered ECC
In Stock
$198.99
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Part Number 32.2ERLPC3-4
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$198.99
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Part Number 321ERLPC3-4H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$199.99
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Part Number 32.2EC3-4H
333MHz 184pin CL3 ECC
Call to Order
$219.99
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Part Number 321EC3-4H
333MHz 184pin CL3 ECC
In Stock
$249.99
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Part Number 322EC3H
333MHz 184pin CL3 ECC
In Stock
$249.99
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Part Number 32.2ERC3-4H
333MHz 184pin CL3 Registered ECC
In Stock
$319.99
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Part Number 32.2ERLPC3-4H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$319.99
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Part Number 321ERC3-4
333MHz 184pin CL3 Registered ECC
In Stock
$92.99
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Part Number 321ERLPC3-4
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$123.99
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Part Number 321ERC3-4H
333MHz 184pin CL3 Registered ECC
In Stock
$149.99
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Part Number 321EC3-4
333MHz 184pin CL3 ECC
In Stock
$154.99
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Part Number 321ERLPC3-4H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$199.99
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Part Number 321EC3-4H
333MHz 184pin CL3 ECC
In Stock
$249.99
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Part Number 321ERC3-2
333MHz 184pin CL3 Registered ECC
In Stock
$46.99
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Part Number 322ERC3
333MHz 184pin CL3 Registered ECC
In Stock
$46.99
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Part Number 322ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$54.99
View Product
Part Number 321ERLPC3-2
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$61.99
View Product
Part Number 321ERC3-2H
333MHz 184pin CL3 Registered ECC
In Stock
$74.99
View Product
Part Number 322ERC3H
333MHz 184pin CL3 Registered ECC
In Stock
$74.99
View Product
Part Number 321EC3-2
333MHz 184pin CL3 ECC
In Stock
$77.99
View Product
Part Number 322ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$87.99
View Product
Part Number 321ERLPC3-2H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$99.99
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Part Number 321EC3-2H
333MHz 184pin CL3 ECC
In Stock
$124.99
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Part Number 322EC3
333MHz 184pin CL3 ECC
In Stock
$154.99
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Part Number 322EC3H
333MHz 184pin CL3 ECC
In Stock
$249.99
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Part Number 321ERC2/5
333MHz 184pin CL2.5 Registered ECC
In Stock
$23.99
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Part Number 321ERC3
333MHz 184pin CL3 Registered ECC
In Stock
$23.99
View Product
Part Number 321ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$30.99
View Product
Part Number 321ERC2/5H
333MHz 184pin CL2.5 Registered ECC
In Stock
$37.99
View Product
Part Number 321ERC3H
333MHz 184pin CL3 Registered ECC
In Stock
$37.99
View Product
Part Number 321EC3
333MHz 184pin CL3 ECC
In Stock
$38.99
View Product
Part Number 321ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$49.99
View Product
Part Number 321EC3H
333MHz 184pin CL3 ECC
In Stock
$62.99
View Product
Part Number 32.5EC3-2
333MHz 184pin CL3 ECC
Call to Order
$80.99
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Part Number 32.5ERC3-2
333MHz 184pin CL3 Registered ECC
Call to Order
$80.99
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Part Number 32.5ERLPC3-2
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$111.99
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Part Number 32.5EC3-2H
333MHz 184pin CL3 ECC
Call to Order
$129.99
View Product
Part Number 32.5ERC3-2H
333MHz 184pin CL3 Registered ECC
Call to Order
$129.99
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Part Number 32.2EC3-4
333MHz 184pin CL3 ECC
Call to Order
$136.99
View Product
Part Number 32.5ERLPC3-2H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$179.99
View Product
Part Number 32.2ERC3-4
333MHz 184pin CL3 Registered ECC
In Stock
$198.99
View Product
Part Number 32.2ERLPC3-4
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$198.99
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Part Number 32.2EC3-4H
333MHz 184pin CL3 ECC
Call to Order
$219.99
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Part Number 32.2ERC3-4H
333MHz 184pin CL3 Registered ECC
In Stock
$319.99
View Product
Part Number 32.2ERLPC3-4H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$319.99
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Part Number 32.5EC3
333MHz 184pin CL3 ECC
Call to Order
$40.99
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Part Number 32.5ERC3
333MHz 184pin CL3 Registered ECC
Call to Order
$40.99
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Part Number 32.5ERLPC2/5
333MHz 184pin CL2.5 Registered Low Profile ECC
In Stock
$55.99
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Part Number 32.5ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$55.99
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Part Number 32.5EC3H
333MHz 184pin CL3 ECC
Call to Order
$64.99
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Part Number 32.5ERC3H
333MHz 184pin CL3 Registered ECC
Call to Order
$64.99
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Part Number 32.2EC3-2
333MHz 184pin CL3 ECC
Call to Order
$68.99
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Part Number 32.5ERLPC2/5H
333MHz 184pin CL2.5 Registered Low Profile ECC
In Stock
$89.99
View Product
Part Number 32.5ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$89.99
View Product
Part Number 32.2ERC3-2
333MHz 184pin CL3 Registered ECC
In Stock
$99.99
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Part Number 32.2ERLPC3-2
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$99.99
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Part Number 32.2EC3-2H
333MHz 184pin CL3 ECC
Call to Order
$109.99
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Part Number 32.2ERC3-2H
333MHz 184pin CL3 Registered ECC
In Stock
$159.99
View Product
Part Number 32.2ERLPC3-2H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$159.99
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Part Number 32.2EC3
333MHz 184pin CL3 ECC
Call to Order
$34.99
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Part Number 32.2ERC3
333MHz 184pin CL3 Registered ECC
In Stock
$49.99
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Part Number 32.2ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$49.99
View Product
Part Number 32.2EC3H
333MHz 184pin CL3 ECC
Call to Order
$54.99
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Part Number 32.2ERC3H
333MHz 184pin CL3 Registered ECC
In Stock
$79.99
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Part Number 32.2ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$79.99
View Product
Part Number 32.1EC3
333MHz 184pin CL3 ECC
In Stock
$23.99
View Product
Part Number 32.1ERC3
333MHz 184pin CL3 Registered ECC
In Stock
$30.99
View Product
Part Number 32.1ERLPC3
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$35.99
View Product
Part Number 32.1EC3H
333MHz 184pin CL3 ECC
In Stock
$37.99
View Product
Part Number 32.1ERC3H
333MHz 184pin CL3 Registered ECC
In Stock
$49.99
View Product
Part Number 32.1ERLPC3H
333MHz 184pin CL3 Registered Low Profile ECC
In Stock
$57.99
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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
KTM-JS20/512 512MB DDR PC2700 333MHz ECC REG Low Profile DIMM Kingston 32.5ERLPC2/5
KTM-JS20/1G 1GB DDR PC2700 333MHz ECC REG DIMM Kingston 321ERC2/5
KTM-JS20/2G 2GB DDR PC2700 333MHz ECC DIMM Kingston 322EC3