CMS 4GB DDR2 6400 800MHz SODIMM Memory Upgrade - Reliable Laptop RAM

In this review the CMS 4GB DDR2 6400 800MHz SODIMM is evaluated as a straightforward memory upgrade for older laptops that use 200-pin DDR2 SODIMM modules. The bottom line: this single 4GB stick is best for users who need a simple, compatible boost in multitasking for systems like the Compaq Presario CQ56 series, and the main reason to buy is the guaranteed model compatibility and lifetime warranty when purchased from the maker. It is not cutting-edge memory, but it delivers reliable, plug-and-play capacity increase for supported legacy notebooks.

Key Features

• Guaranteed Compatibility: CMS states compatibility with listed models, which reduces guesswork when upgrading older HP/Compaq laptops.
• Form Factor: The 200-pin SODIMM design fits the small memory socket used in many laptops, making installation simple for end users.
• Speed: DDR2-6400 at 800 MHz offers the correct timing and bandwidth expected for systems built around DDR2 memory controllers.
• Single Module Kit: Sold as a single 4GB stick, it lets users increase capacity without replacing both modules when a single slot upgrade is sufficient.
• Lifetime Warranty: A limited lifetime warranty from Computer Memory Solutions is available when bought directly, providing long-term peace of mind.

Who It's For

This module is designed for owners of legacy laptops that require DDR2 SODIMM memory, such as the HP/Compaq Presario CQ56-219WM. It is most useful for users who run everyday tasks like web browsing, email, office apps, and light multitasking and who need a cost-effective memory capacity increase rather than the highest possible performance.

It is not intended for modern desktops, gaming rigs, or any system that requires DDR3 or DDR4 memory. Buyers who need maximum memory bandwidth or are using newer platforms should look for contemporary DDR3/DDR4 modules instead.

Pros & Cons

Pros

• Clear compatibility listing reduces installation uncertainty for supported laptop models.
• 200-pin SODIMM form factor makes it easy to install in small laptop sockets.
• Lifetime warranty option provides added confidence when purchased from the brand.

Cons

• DDR2 at 800 MHz is outdated compared with modern memory standards, so it is only useful for older systems.

Specifications

Brand	Computer Memory Solutions
Capacity	4GB (1x4GB)
Memory Type	DDR2 SODIMM, 200-pin
Speed	PC2-6400 / 800 MHz
Kit	Single piece kit (1 module)
Warranty	Limited lifetime warranty when purchased directly from CMS

Our Verdict

The CMS 4GB DDR2 6400 SODIMM is a practical, no-frills upgrade for older laptops that accept 200-pin DDR2 memory. It represents good value for users who need a reliable way to improve everyday responsiveness and multitasking on compatible systems, backed by the vendor's lifetime warranty option.

Frequently Asked Questions

Will this module fit my Compaq Presario CQ56?
Yes, this product lists compatibility with the Presario CQ56-219WM and uses the 200-pin DDR2 SODIMM form factor required by that model.

Can I mix this 4GB stick with existing RAM in my laptop?
Yes, you can install it alongside another module if the laptop has a free slot or replace an existing module, but mixed capacities may run in single-channel mode depending on the system.

Is this covered by a warranty?
Computer Memory Solutions offers a limited lifetime warranty when the module is bought directly from the manufacturer.