The RAMs from Kingston are factory- tested come with free technical support after the purchase. If you are looking to buy 4 GB RAM, these RAMs are available to buy online from top online shopping websites such as Amazon, Flipkart, Tata Cliq, eBay and Paytm. You can use our filter tool to select the features as per your need and choose the best product. If you compare the price of these RAMs on shopping websites, you can get it at the lowest price online. You can make use of our price comparison tool for this purpose. All the RAMs are reliable and come with lifetime warranty. Further also check various cash back offers and discounts on the product.