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The best memory upgrades for your Hewlett Packard Pavilion Desktop A4 Series A420 ES Desktop!

We've spent years amassing all the information we need to make sure you get the right memory for your Hewlett Packard Pavilion Desktop A4 Series A420 ES Desktop. We guarantee this memory will work in your machine for the life of your machine. Your Hewlett Packard Pavilion Desktop A4 Series A420 ES supports up to 1024 MB in two slots and modules must be installed one at a time.

 

  Code OEM DescriptionCapacityKit OfPriceinc VAT 
expand   DIMM
512MB 2.5V DDR Unbuffered PC333 x64 DIMM 184pin DDR DC340A 3356468 DC340A 512MB 2.5V DDR Unbuffered PC333 x64 DIMM 184pin DDR 512MB1 £12.23 £14.68 Buy
256MB 2.5V DDR Unbuffered PC333 x64 DIMM 184pin DDR DC339A 3356469 DC339A 256MB 2.5V DDR Unbuffered PC333 x64 DIMM 184pin DDR 256MB1 £10.30 £12.36 Buy
128MB 2.5V DDR Unbuffered PC333 x64 DIMM 184pin DDR DC338A 3356470 DC338A 128MB 2.5V DDR Unbuffered PC333 x64 DIMM 184pin DDR 128MB1 £0.00 £0.00 Call us

More information about this machine

Detailed machine info

Is base memory removeable?y
Number of memory slots2
Number of memory banks2
Number of modules per bank1
Maximum installable memory1024

Original Memory Configuration

more about your Hewlett Packard Pavilion Desktop A4 Series A420 ES machine
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