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How can I tell what RAM will fit my computer?

I want to increase the RAM size of my laptop from 2GB to 4GB. I want advice on company, RAM type(DDR3?) and other things related to buying a RAM.

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marked as duplicate by RedGrittyBrick, TFM, slhck Nov 26 '12 at 12:13

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Welcome to superuser. See memory upgrade - Note: shopping questions ("advice on company") are off topic. RAM type depends on specific machine. Ability to add memory depends on available slots and on machine limits. 32-bit OS can't use all 4GB. – RedGrittyBrick Nov 26 '12 at 10:03
Processsor is Core I3, so it is 64 bit.. i want to know the best company name and ram with latest technology – CoderMan Nov 26 '12 at 10:07
We all do, but this Q&A site is not suited to discussions of "best company name" or "latest technology" - the FAQ explains. Also, vendors used to sell 64-bit hardware with 32-bit operating systems. It's the OS that matters. – RedGrittyBrick Nov 26 '12 at 10:10

You want a 4GB DDR3 PC3-10600 (or PC3-8500) SODIMM. Any one should do, more or less, but Crucial offers one that is guaranteed compatible for around $19, part number CT2151387.

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