The IBM/Lenovo Power 550 Express Model M50 (9409-M50) uses DDR2 DIMM ECC PC2-5300 667MHz, ECC REG PC2-5300 667MHz 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 PC2-5300 667MHz, ECC REG PC2-5300 667MHz
Base Memory 2GB (Removable)
Upgrade Slots 8 Sockets (4 banks of 2) per processor card
Maximum Memory 64GB per processor card 128GB with 2 processor cards
Maximum Module Size 8GB
CPU & Chipset IBM POWER6
Bus Architecture PCI-X
Manufacturer Part Numbers
  • 9409-M50
Part Number 531EC7
667MHz 240pin CL7 ECC
In Stock
$15.99
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Part Number 532EC7
667MHz 240pin CL7 ECC
In Stock
$20.99
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Part Number 531ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$23.99
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Part Number 531EC7H
667MHz 240pin CL7 ECC
In Stock
$24.99
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Part Number 531EC7-2
667MHz 240pin CL7 ECC
In Stock
$30.99
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Part Number 532EC7H
667MHz 240pin CL7 ECC
In Stock
$32.99
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Part Number 531ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$37.99
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Part Number 532ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$37.99
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Part Number 532EC7-2
667MHz 240pin CL7 ECC
In Stock
$40.99
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Part Number 53.2EC7
667MHz 240pin CL7 ECC
In Stock
$46.99
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Part Number 53.5EC7
667MHz 240pin CL7 ECC
In Stock
$46.99
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Part Number 53.5ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$46.99
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Part Number 531ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$46.99
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Part Number 531EC7-2H
667MHz 240pin CL7 ECC
In Stock
$49.99
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Part Number 53.2ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$52.99
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Part Number 532ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$59.99
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Part Number 531EC7-4
667MHz 240pin CL7 ECC
In Stock
$61.99
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Part Number 534ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$61.99
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Part Number 532EC7-2H
667MHz 240pin CL7 ECC
In Stock
$64.99
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Part Number 53.2EC7H
667MHz 240pin CL7 ECC
In Stock
$74.99
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Part Number 53.5EC7H
667MHz 240pin CL7 ECC
In Stock
$74.99
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Part Number 53.5ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$74.99
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Part Number 531ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$74.99
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Part Number 532ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$74.99
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Part Number 532EC7-4
667MHz 240pin CL7 ECC
In Stock
$80.99
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Part Number 53.2ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$84.99
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Part Number 53.2EC7-2
667MHz 240pin CL7 ECC
In Stock
$92.99
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Part Number 53.5EC7-2
667MHz 240pin CL7 ECC
In Stock
$92.99
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Part Number 53.5ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$92.99
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Part Number 531ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$92.99
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Part Number 531EC7-4H
667MHz 240pin CL7 ECC
In Stock
$99.99
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Part Number 534ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$99.99
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Part Number 532ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$119.99
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Part Number 534ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$123.99
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Part Number 532EC7-4H
667MHz 240pin CL7 ECC
In Stock
$129.99
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Part Number 532ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$148.99
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Part Number 53.2EC7-2H
667MHz 240pin CL7 ECC
In Stock
$149.99
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Part Number 53.5EC7-2H
667MHz 240pin CL7 ECC
In Stock
$149.99
View Product
Part Number 53.5ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$149.99
View Product
Part Number 531ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$149.99
View Product
Part Number 534EC7
667MHz 240pin CL7 ECC
In Stock
$154.99
View Product
Part Number 53.5EC7-4
667MHz 240pin CL7 ECC
In Stock
$185.99
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Part Number 53.5ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$185.99
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Part Number 534ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$199.99
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Part Number 532ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$239.99
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Part Number 534ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$247.99
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Part Number 534EC7H
667MHz 240pin CL7 ECC
In Stock
$249.99
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Part Number 53.5EC7-4H
667MHz 240pin CL7 ECC
In Stock
$299.99
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Part Number 53.5ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$299.99
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Part Number 534EC7-2
667MHz 240pin CL7 ECC
In Stock
$309.99
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Part Number 538ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$340.99
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Part Number 538EC7
667MHz 240pin CL7 ECC
In Stock
$371.99
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Part Number 534ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$399.99
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Part Number 534ERC7-8
667MHz 240pin CL7 Registered ECC
In Stock
$495.99
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Part Number 534EC7-2H
667MHz 240pin CL7 ECC
In Stock
$499.99
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Part Number 538ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$549.99
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Part Number 538EC7H
667MHz 240pin CL7 ECC
In Stock
$599.99
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Part Number 534EC7-4
667MHz 240pin CL7 ECC
In Stock
$619.99
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Part Number 538ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$681.99
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Part Number 538EC7-2
667MHz 240pin CL7 ECC
In Stock
$743.99
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Part Number 534ERC7-8H
667MHz 240pin CL7 Registered ECC
In Stock
$799.99
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Part Number 534EC7-4H
667MHz 240pin CL7 ECC
In Stock
$999.99
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Part Number 538ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$1099.99
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Part Number 538EC7-2H
667MHz 240pin CL7 ECC
In Stock
$1199.99
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Part Number 534EC7-8
667MHz 240pin CL7 ECC
In Stock
$1239.99
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Part Number 538ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$1363.99
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Part Number 538EC7-4
667MHz 240pin CL7 ECC
In Stock
$1487.99
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Part Number 534EC7-8H
667MHz 240pin CL7 ECC
In Stock
$1999.99
View Product
Part Number 538ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$2199.99
View Product
Part Number 538EC7-4H
667MHz 240pin CL7 ECC
In Stock
$2399.99
View Product
Part Number 534ERC7-8
667MHz 240pin CL7 Registered ECC
In Stock
$495.99
View Product
Part Number 534ERC7-8H
667MHz 240pin CL7 Registered ECC
In Stock
$799.99
View Product
Part Number 534EC7-8
667MHz 240pin CL7 ECC
In Stock
$1239.99
View Product
Part Number 538ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$1363.99
View Product
Part Number 538EC7-4
667MHz 240pin CL7 ECC
In Stock
$1487.99
View Product
Part Number 534EC7-8H
667MHz 240pin CL7 ECC
In Stock
$1999.99
View Product
Part Number 538ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$2199.99
View Product
Part Number 538EC7-4H
667MHz 240pin CL7 ECC
In Stock
$2399.99
View Product
Part Number 534ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$247.99
View Product
Part Number 534ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$399.99
View Product
Part Number 534EC7-4
667MHz 240pin CL7 ECC
In Stock
$619.99
View Product
Part Number 538ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$681.99
View Product
Part Number 538EC7-2
667MHz 240pin CL7 ECC
In Stock
$743.99
View Product
Part Number 534EC7-4H
667MHz 240pin CL7 ECC
In Stock
$999.99
View Product
Part Number 538ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$1099.99
View Product
Part Number 538EC7-2H
667MHz 240pin CL7 ECC
In Stock
$1199.99
View Product
Part Number 532EC7-4
667MHz 240pin CL7 ECC
In Stock
$80.99
View Product
Part Number 534ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$123.99
View Product
Part Number 532EC7-4H
667MHz 240pin CL7 ECC
In Stock
$129.99
View Product
Part Number 532ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$148.99
View Product
Part Number 534ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$199.99
View Product
Part Number 532ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$239.99
View Product
Part Number 534EC7-2
667MHz 240pin CL7 ECC
In Stock
$309.99
View Product
Part Number 538ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$340.99
View Product
Part Number 538EC7
667MHz 240pin CL7 ECC
In Stock
$371.99
View Product
Part Number 534EC7-2H
667MHz 240pin CL7 ECC
In Stock
$499.99
View Product
Part Number 538ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$549.99
View Product
Part Number 538EC7H
667MHz 240pin CL7 ECC
In Stock
$599.99
View Product
Part Number 532EC7-2
667MHz 240pin CL7 ECC
In Stock
$40.99
View Product
Part Number 531EC7-4
667MHz 240pin CL7 ECC
In Stock
$61.99
View Product
Part Number 534ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$61.99
View Product
Part Number 532EC7-2H
667MHz 240pin CL7 ECC
In Stock
$64.99
View Product
Part Number 532ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$74.99
View Product
Part Number 531ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$92.99
View Product
Part Number 531EC7-4H
667MHz 240pin CL7 ECC
In Stock
$99.99
View Product
Part Number 534ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$99.99
View Product
Part Number 532ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$119.99
View Product
Part Number 531ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$149.99
View Product
Part Number 534EC7
667MHz 240pin CL7 ECC
In Stock
$154.99
View Product
Part Number 534EC7H
667MHz 240pin CL7 ECC
In Stock
$249.99
View Product
Part Number 532EC7
667MHz 240pin CL7 ECC
In Stock
$20.99
View Product
Part Number 531EC7-2
667MHz 240pin CL7 ECC
In Stock
$30.99
View Product
Part Number 532EC7H
667MHz 240pin CL7 ECC
In Stock
$32.99
View Product
Part Number 532ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$37.99
View Product
Part Number 531ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$46.99
View Product
Part Number 531EC7-2H
667MHz 240pin CL7 ECC
In Stock
$49.99
View Product
Part Number 532ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$59.99
View Product
Part Number 531ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$74.99
View Product
Part Number 53.5EC7-4
667MHz 240pin CL7 ECC
In Stock
$185.99
View Product
Part Number 53.5ERC7-4
667MHz 240pin CL7 Registered ECC
In Stock
$185.99
View Product
Part Number 53.5EC7-4H
667MHz 240pin CL7 ECC
In Stock
$299.99
View Product
Part Number 53.5ERC7-4H
667MHz 240pin CL7 Registered ECC
In Stock
$299.99
View Product
Part Number 531EC7
667MHz 240pin CL7 ECC
In Stock
$15.99
View Product
Part Number 531ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$23.99
View Product
Part Number 531EC7H
667MHz 240pin CL7 ECC
In Stock
$24.99
View Product
Part Number 531ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$37.99
View Product
Part Number 53.5EC7-2
667MHz 240pin CL7 ECC
In Stock
$92.99
View Product
Part Number 53.5ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$92.99
View Product
Part Number 53.5EC7-2H
667MHz 240pin CL7 ECC
In Stock
$149.99
View Product
Part Number 53.5ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$149.99
View Product
Part Number 53.5EC7
667MHz 240pin CL7 ECC
In Stock
$46.99
View Product
Part Number 53.5ERC7
667MHz 240pin CL7 Registered ECC
In Stock
$46.99
View Product
Part Number 53.2ERC7-2
667MHz 240pin CL7 Registered ECC
In Stock
$52.99
View Product
Part Number 53.5EC7H
667MHz 240pin CL7 ECC
In Stock
$74.99
View Product
Part Number 53.5ERC7H
667MHz 240pin CL7 Registered ECC
In Stock
$74.99
View Product
Part Number 53.2ERC7-2H
667MHz 240pin CL7 Registered ECC
In Stock
$84.99
View Product
Part Number 53.2EC7-2
667MHz 240pin CL7 ECC
In Stock
$92.99
View Product
Part Number 53.2EC7-2H
667MHz 240pin CL7 ECC
In Stock
$149.99
View Product
Part Number 53.2EC7
667MHz 240pin CL7 ECC
In Stock
$46.99
View Product
Part Number 53.2EC7H
667MHz 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
KTM-M15K2/4G 4GB Kit of 2 2GB DDR2 PC2-5300 667MHz ECC DIMM Kingston 532EC7-2
KTM-M15K2/8G 8GB Kit of 2 4GB DDR2 PC2-5300 667MHz ECC DIMM Kingston 534EC7-2