One of the things you must take care of when purchasing a 4GB DDR2 RAM for your laptop is the RAM frequency as it determines the time the laptop takes to process data and perform an action. DDR2 is perfectly okay for common, daily usage purposes. DDR2 is also much flexible than the DDR. Once you have gone through the 4GB DDR2 RAM for laptop price list, you should pick out one which suits your budget and needs. You can then buy it online by visiting reliable online stores such as Infibeam, Flipkart, and Amazon, etc. To know the store that offers the best deal, you can make use of our price comparison tool. Further, check for additional cash back offers and discounts on the product for a slash in the final price.