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I want extend ram but i dont know bus speed .
Hi, Here are the specifications for a HP 430/431 Notebook. It shows that the maximum RAM is 8GB over 2 SODIMM slots, i.e. 2 x 4GB DDR3 PC3 10600 1333MHz. http://h20564.www2.hp.com/hpsc/doc/publi… Here is a link to one supplier. It is not a recommendation to use them, it is shown to give an idea of the price. There are a lot more online that may suit you better. https://www.amazon.com/621569-001-4GB-13…
