Although 5X is able to compress many different types of online data, there are a few which cannot be accelerated:

With traditional dialup methods, the text and graphics that make up Web pages get sent from the server to you over your phone line. Because of the large amount of data required to be sent, this process can be painfully slow. 5X compresses this data using a proprietary technology, and sends it over your existing dialup phone line. This compression process allows a smaller amount data to be sent – up to five times less – making the download time of your web pages and your online experience that much faster. As an added download time reducer, 5X stores elements of the Web sites you visit frequently so you do not have to re-download them every time you visit these sites.