The HP/Compaq AlphaServer/AlphaStation DS15 uses SDRAM DIMM PC100 100MHz, ECC 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 PC100 100MHz, ECC PC133 133MHz
Base Memory 512MB (Removable) or 1GB (Removable) or 2GB (Removable)
Upgrade Slots 4 Sockets (2 banks of 2)
Maximum Memory 2GB with current Quantum Technology memory
Maximum Module Size 512MB
CPU & Chipset Alpha 21264C 1 GHz
Bus Architecture PCI
Manufacturer Part Numbers
  • DA-75CAA-AA
  • DA-75CAA-AW
  • DY-75CAA-AA
  • DY-75CAA-AW
Part Number 21.1C3
100MHz 168pin CL3
In Stock
$15.99
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Part Number 21.2C3
100MHz 168pin CL3
In Stock
$18.99
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Part Number 21.5C3
100MHz 168pin CL3
In Stock
$20.99
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Part Number 21/64mC3
100MHz 168pin CL3
Call to Order
$23.99
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Part Number 21.1C3H
100MHz 168pin CL3
In Stock
$24.99
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Part Number 21.2C3H
100MHz 168pin CL3
In Stock
$29.99
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Part Number 12/64mEC3
133MHz 144pin CL3 ECC
In Stock
$30.99
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Part Number 21.5C3H
100MHz 168pin CL3
In Stock
$32.99
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Part Number 21.2C3-2
100MHz 168pin CL3
In Stock
$37.99
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Part Number 21/64mC3H
100MHz 168pin CL3
Call to Order
$37.99
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Part Number 12.1EC3
133MHz 144pin CL3 ECC
In Stock
$39.99
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Part Number 12.5EC3
133MHz 144pin CL3 ECC
In Stock
$40.99
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Part Number 21.5C3-2
100MHz 168pin CL3
In Stock
$40.99
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Part Number 12/64mEC3H
133MHz 144pin CL3 ECC
In Stock
$49.99
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Part Number 21.2C3-2H
100MHz 168pin CL3
In Stock
$59.99
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Part Number 12.1EC3H
133MHz 144pin CL3 ECC
In Stock
$63.99
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Part Number 12.5EC3H
133MHz 144pin CL3 ECC
In Stock
$64.99
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Part Number 21.5C3-2H
100MHz 168pin CL3
In Stock
$64.99
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Part Number 21.2C3-4
100MHz 168pin CL3
In Stock
$74.99
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Part Number 12.5EC3-2
133MHz 144pin CL3 ECC
In Stock
$80.99
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Part Number 12.2EC3
133MHz 144pin CL3 ECC
In Stock
$92.99
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Part Number 21.2C3-4H
100MHz 168pin CL3
In Stock
$119.99
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Part Number 12.5EC3-2H
133MHz 144pin CL3 ECC
In Stock
$129.99
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Part Number 12.2EC3H
133MHz 144pin CL3 ECC
In Stock
$149.99
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Part Number 12.2EC3-2
133MHz 144pin CL3 ECC
In Stock
$185.99
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Part Number 12.2EC3-2H
133MHz 144pin CL3 ECC
In Stock
$299.99
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Part Number 21.5C3-2
100MHz 168pin CL3
In Stock
$40.99
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Part Number 21.5C3-2H
100MHz 168pin CL3
In Stock
$64.99
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Part Number 21.2C3-4
100MHz 168pin CL3
In Stock
$74.99
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Part Number 12.5EC3-2
133MHz 144pin CL3 ECC
In Stock
$80.99
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Part Number 21.2C3-4H
100MHz 168pin CL3
In Stock
$119.99
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Part Number 12.5EC3-2H
133MHz 144pin CL3 ECC
In Stock
$129.99
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Part Number 21.5C3
100MHz 168pin CL3
In Stock
$20.99
View Product
Part Number 21.5C3H
100MHz 168pin CL3
In Stock
$32.99
View Product
Part Number 21.2C3-2
100MHz 168pin CL3
In Stock
$37.99
View Product
Part Number 12.5EC3
133MHz 144pin CL3 ECC
In Stock
$40.99
View Product
Part Number 21.2C3-2H
100MHz 168pin CL3
In Stock
$59.99
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Part Number 12.5EC3H
133MHz 144pin CL3 ECC
In Stock
$64.99
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Part Number 12.2EC3-2
133MHz 144pin CL3 ECC
In Stock
$185.99
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Part Number 12.2EC3-2H
133MHz 144pin CL3 ECC
In Stock
$299.99
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Part Number 21.2C3
100MHz 168pin CL3
In Stock
$18.99
View Product
Part Number 21.2C3H
100MHz 168pin CL3
In Stock
$29.99
View Product
Part Number 12.2EC3
133MHz 144pin CL3 ECC
In Stock
$92.99
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Part Number 12.2EC3H
133MHz 144pin CL3 ECC
In Stock
$149.99
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Part Number 21.1C3
100MHz 168pin CL3
In Stock
$15.99
View Product
Part Number 21.1C3H
100MHz 168pin CL3
In Stock
$24.99
View Product
Part Number 12.1EC3
133MHz 144pin CL3 ECC
In Stock
$39.99
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Part Number 12.1EC3H
133MHz 144pin CL3 ECC
In Stock
$63.99
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Part Number 21/64mC3
100MHz 168pin CL3
Call to Order
$23.99
View Product
Part Number 12/64mEC3
133MHz 144pin CL3 ECC
In Stock
$30.99
View Product
Part Number 21/64mC3H
100MHz 168pin CL3
Call to Order
$37.99
View Product
Part Number 12/64mEC3H
133MHz 144pin CL3 ECC
In Stock
$49.99
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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
KTC-MS620/1G 1GB Kit of 4 256MB SDRAM PC100 100MHz DIMM Kingston 21.2C3-4
KTC-MS620/2G 2GB Kit of 2 1GB SDRAM PC133 133MHz ECC REG 200pin DIMM Kingston OP231ER-2
KTC-MS620/4G 4GB Kit of 4 1GB SDRAM PC133 133MHz ECC SODIMM Kingston 121EC3-4