The Dell Latitude D420 uses DDR2 SODIMM PC2-4200 533MHz, 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 SODIMM PC2-4200 533MHz, PC2-5300 667MHz
Base Memory 512MB (Non-removable)
Upgrade Slots 1 Socket(s)
Maximum Memory 2.50GB
Maximum Module Size
CPU & Chipset Intel Core Solo 1.6GHz/ Intel 945GMS
Bus Architecture PC Card; USB 2.0/3.x Type-A
Notes Important: This system is configurable and can ship with either DDR2-533 (KTD-INSP6000A/xx) or DDR2-667 (KTD-INSP6000B/xx). When mixing DDR2-533 and DDR2-667 modules, the system will default DDR2-533 speed.
Manufacturer Part Numbers
  • N/A
Part Number 621C6
533MHz 200pin CL6
In Stock
$7.99
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Part Number 631C6
667MHz 200pin CL6
In Stock
$7.99
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Part Number 621C6H
533MHz 200pin CL6
In Stock
$12.99
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Part Number 631C6H
667MHz 200pin CL6
In Stock
$12.99
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Part Number 622C6
533MHz 200pin CL6
In Stock
$15.99
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Part Number 632C5
667MHz 200pin CL5
In Stock
$15.99
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Part Number 632C6
667MHz 200pin CL6
In Stock
$15.99
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Part Number 622C6H
533MHz 200pin CL6
In Stock
$24.99
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Part Number 632C5H
667MHz 200pin CL5
In Stock
$24.99
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Part Number 632C6H
667MHz 200pin CL6
In Stock
$24.99
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Part Number 634C6
667MHz 200pin CL6
In Stock
$77.99
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Part Number 634C6H
667MHz 200pin CL6
In Stock
$124.99
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Part Number 634C6
667MHz 200pin CL6
In Stock
$77.99
View Product
Part Number 634C6H
667MHz 200pin CL6
In Stock
$124.99
View Product
Part Number 622C6
533MHz 200pin CL6
In Stock
$15.99
View Product
Part Number 632C5
667MHz 200pin CL5
In Stock
$15.99
View Product
Part Number 632C6
667MHz 200pin CL6
In Stock
$15.99
View Product
Part Number 622C6H
533MHz 200pin CL6
In Stock
$24.99
View Product
Part Number 632C5H
667MHz 200pin CL5
In Stock
$24.99
View Product
Part Number 632C6H
667MHz 200pin CL6
In Stock
$24.99
View Product
Part Number 621C6
533MHz 200pin CL6
In Stock
$7.99
View Product
Part Number 631C6
667MHz 200pin CL6
In Stock
$7.99
View Product
Part Number 621C6H
533MHz 200pin CL6
In Stock
$12.99
View Product
Part Number 631C6H
667MHz 200pin CL6
In Stock
$12.99
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
KTD-INSP6000A/1G 1GB DDR2 PC2-4200 533MHz SODIMM Kingston 621C6
KTD-INSP6000A/2G 2GB DDR2 PC2-4200 533MHz SODIMM Kingston 622C6
KTD-INSP6000B/1G 1GB DDR2 PC2-5300 667MHz SODIMM Kingston 631C6
KTD-INSP6000B/2G 2GB DDR2 PC2-5300 667MHz SODIMM Kingston 632C6
M51264F50 4GB DDR2 PC2-5300 667MHz SODIMM Kingston 634C6
CT730037 2GB DDR2 PC2-5300 667MHz SODIMM Crucial 632C5