The IBM/Lenovo Netfinity 5100 (8658-3xx, 4xx) uses SDRAM DIMM ECC REG PC133 133MHz 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 SDRAM DIMM ECC REG PC133 133MHz
Base Memory 128MB (Removable)
Upgrade Slots 4 Sockets
Maximum Memory 2GB with current product
Maximum Module Size 512MB
CPU & Chipset Intel Pentium III 800 MHz Intel Pentium III 866 MHz
Bus Architecture ISA; PCI
Manufacturer Part Numbers
  • 8658-3xx
  • 8658-4xx
Part Number 12/64mERC3
133MHz 144pin CL3 Registered ECC
In Stock
$30.99
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Part Number 12.1ERC3
133MHz 144pin CL3 Registered ECC
In Stock
$37.99
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Part Number 12/64mERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$49.99
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Part Number 12.5ERC3
133MHz 144pin CL3 Registered ECC
In Stock
$55.99
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Part Number 12.2ERC3
133MHz 144pin CL3 Registered ECC
In Stock
$57.99
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Part Number 12.1ERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$59.99
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Part Number 12.5ERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$89.99
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Part Number 12.2ERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$92.99
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Part Number 12.5ERC3-2
133MHz 144pin CL3 Registered ECC
In Stock
$111.99
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Part Number 12.2ERC3-2
133MHz 144pin CL3 Registered ECC
In Stock
$114.99
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Part Number 121ERC3
133MHz 144pin CL3 Registered ECC
In Stock
$123.99
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Part Number 12.5ERC3-2H
133MHz 144pin CL3 Registered ECC
In Stock
$179.99
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Part Number 12.2ERC3-2H
133MHz 144pin CL3 Registered ECC
In Stock
$184.99
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Part Number 121ERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$199.99
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Part Number 12.5ERC3-2
133MHz 144pin CL3 Registered ECC
In Stock
$111.99
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Part Number 121ERC3
133MHz 144pin CL3 Registered ECC
In Stock
$123.99
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Part Number 12.5ERC3-2H
133MHz 144pin CL3 Registered ECC
In Stock
$179.99
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Part Number 121ERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$199.99
View Product
Part Number 12.5ERC3
133MHz 144pin CL3 Registered ECC
In Stock
$55.99
View Product
Part Number 12.5ERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$89.99
View Product
Part Number 12.2ERC3-2
133MHz 144pin CL3 Registered ECC
In Stock
$114.99
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Part Number 12.2ERC3-2H
133MHz 144pin CL3 Registered ECC
In Stock
$184.99
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Part Number 12.2ERC3
133MHz 144pin CL3 Registered ECC
In Stock
$57.99
View Product
Part Number 12.2ERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$92.99
View Product
Part Number 12.1ERC3
133MHz 144pin CL3 Registered ECC
In Stock
$37.99
View Product
Part Number 12.1ERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$59.99
View Product
Part Number 12/64mERC3
133MHz 144pin CL3 Registered ECC
In Stock
$30.99
View Product
Part Number 12/64mERC3H
133MHz 144pin CL3 Registered ECC
In Stock
$49.99
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
KTM3123/128 128MB Module Kingston
KTM3123/256 256MB Module Kingston
KTM3123/512 512MB SDRAM PC133 133MHz ECC REG SODIMM Kingston 12.5ERC3
KTM3123/1024 1GB SDRAM PC133 133MHz ECC REG SODIMM Kingston 121ERC3