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Compaq Presario R4009EA Memory RAM Upgrades

Compaq Presario R4009EA RAM Memory Specification

Choose the following RAM Memory Upgrade for Compaq Presario R4009EA. 

How much memory can I upgrade my Compaq Presario R4009EA to and what is memory type it takes?

You can upgrade your Compaq Presario R4009EA upto a maximum of 2.0 GB, with maximum of 1GB per slot in 2 memory slots. The Compaq Presario R4009EA takes the PC2700 DDR SDRAM SODIMMs Memory Type.

What are memory sockets or slots and how are these divided into bank?

Memory Sockets or Slots are the place where memory RAM modules are inserted in the motherboard. The Compaq Presario R4009EA has 2 memory expansion slots. A memory bank is a group of memory expansion sockets, a bank must be completely filled with memory modules of the same size and type in order for the system to recognize and address the memory. i.e. :


2 sockets (2 banks of 1) This indicates that there are 2 memory slots. These are divided into 2 banks, and each bank consists of one memory slot. So you can add memory one piece at a time for the system to use.

3 sockets (3 banks of 1) This indicates that there are 3 memory slots. These are divided into 3 banks, and each bank consists of one memory slot. So you can add memory one piece at a time for the system to use.

4 sockets (2 banks of 2) This indicates that there are 4 memory slots. These are divided into 2 banks, and each bank consists of two memory slots. So you must add memory two pieces at a time (they must be the same size and type of memory) in order for the system to benefit from the upgrade.

8 sockets (4 banks of 2) This indicates that there are 8 memory slots. These are divided into 4 banks, and each bank consists of two memory slots. So you must add memory two pieces at a time (they must be the same size and type of memory) in order for the system to benefit from the upgrade.

12 sockets (3 banks of 4) This indicates that there are 12 memory slots. These are divided into 3 banks, and each bank consists of four memory slots. So you must add memory four pieces at a time (and they must be the same size and type of memory) in order for the system to benefit from the upgrade.

How do I install memory on my Compaq Presario R4009EA?

Memory installation help guides can be found at the following link.
Memory Installation Guide
144-pin Laptop SO-DIMM Installation Guide
200-pin Laptop SO-DIMM Installation Guide

I still need some help on choosing my Compaq Presario R4009EA memory upgrade, what do I do?

We are here to help, please contact our memory experts online through our live chat support by clicking the following chat icon. You may also email us at orders@buycomputermemory.com. Or call 209-475-0153