Imagine that you have three servers: one for your emails, one for your customer database and another to host your website. Each of these servers is running at only 15 percent capacity. In a traditional set-up with x86 servers, there’s no way to use the remaining 85 percent for a different purpose. One server means one function. And if, for example, you wanted to add a server for your applications, you’d need to buy new hardware to house it.