Cisco Router 2821 Compatible RAM Memory Upgrades

We guarantee that our RAM memory upgrades are 100% compatible for your Cisco Router 2821
Everyday low prices with twice daily competitor price checks. Price Promise
Cisco Router 2821 For Illustration Purposes Only

Help Me Choose

Your system memory specification is listed below, most importantly your maximum memory capacity:

  • Maximum Memory Capacity: 1GB
  • Default Installed Memory: 256MB (Removable)
  • Number of Slots: 2 Slots (2 Banks of 1)

You should also determine how much memory you already have installed and in what configuration. These useful links should explain how to do this:

Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.

Price Promise We monitor the prices of our competitors twice daily, giving you the peace of mind that our prices are the lowest online.

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60-Day Returns Policy

Not 100% happy with your order then return it to us under our No Quibble 60 Day Money Back Guarantee. 

Our 60-Day return policy gives you plenty of time to consider your purchase. You can return any item in its original condition within 60 days of the date of shipment for a refund or exchange. We will also provide you a Freepost label to return the memory which ensures that there is no cost to our customers.

Lifetime Warranty

Feel confident that your memory will last a lifetime. Our lifetime warranty guarantees that if your memory should ever fail we will replace or repair the product free of charge. Please note that the lifetime warranty refers only to memory modules and not flash memory or storage products. Please see the individual 'product details' for warranties specific to each product. For complete warranty details please see our Terms and Conditions 

Premium Brand Chips

Not all memory is the same. Our memory is manufactured using premium brand chips from manufacturers including Samsung, Elpida (NEC), Hynix (Hyundai), Micron and Hypertec. This ensures the highest level of reliability and compatability. You may be able to buy cheaper memory but you will not be able to buy the same quality of memory cheaper. 

Memory Installation Guides

Memory is one of the simplest upgrades that you can perform on your computer. To make it even easier our support team have created both installation videos and a written guide for you to follow. 

Should you have any issues with your installation please see our FAQ page or contact our support team via live chat or at 

Installation Guide Installation Guide


5086 Customers have written a Trustpilot review

Star rating


I purchased some netbook memory which, as unexciting as it may appear, simply worked, what more could I ask for. The product description was enough to confirm I had the right item. The service was prompt and the memory well packed.

By James Hastell. On 18. Dec
Star rating

Superb service

Despite only sending one memory module instead of two, this was rectified immediately, the complete shipment delivered in four days. A good example of purchasing from the internet.

By Brian Tandy. On 18. Dec
Star rating

Ram Memory

Thank Chris for all his tech. info.Thank Jordan for helping out for my miss placed order and thanks for your trust . Products excellent at a good price thou I did miss the email a day later about further discounts - but your help made up for that!! Weoll done.Sorry Chris may be a "her" sorry if this is the case.

By David Robinson. On 18. Dec
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