Which number on this laptop SODIMM RAM memory module identifies it so that I can order an identical module to run in dual-channel mode?

PROBLEM: I have read your article on RAM memory. However, I would still like some more info, if you do not mind? If you take a look at my attached photo, can you please tell which part of the two long numbers I should be taking into consideration when looking to add RAM – not replace RAM? I understand that for everything to run smoothly it is vital that the two modules match. I would like to buy one to match my existing one, rather than buy a pair, replacing the one already installed.

A 4GB DDR3 laptop SODIMM memory module showing the part number
A 4GB DDR3 laptop SODIMM memory module showing the part number. Click on the image to see its full size

ANSWER: This is the part number on the laptop SODIMM module shown above – HMT351S6BFR8C-H9.

Enter it in a search engine and you’ll be able to find plenty of suppliers. I saw some available on eBay. Just remember that you need a 64-bit version of Windows Vista / 7 / 8.1 in order to be able to use more than 4GB. A 32-bit version of Windows cannot use more than 4GB. If you don’t know, enter the following search query into a search engine: 32 bit or 64 bit windows – adding your version of Windows.

You only need matching modules if you want to run the memory in dual-channel mode, which is slightly faster. If you visit crucial.com and search for your model of laptop, using the Memory Advisor will tell you which capacities of memory modules can be used on it.

Read this:

Matching Modules for Dual-Channel –


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I am an experienced PC technician who has been the owner and sole writer of the PC Buyer Beware! website since 2004. I am learning all the time in this very dynamic, ever-changing field.