Security - Being on a dedicated server, you are on your own. You do not share the server with anybody else. Nobody has access to the server. So you can be sure that you data is safe. For example on a shared host in case of mis-configured server some other users on the server might be able to read your data. When on VPS, there is always a sysadmin that can read your data. When on dedicated - nobody is granted access to the server except you.
CPU power - When on a shared hosting plan or a VPS you share the CPU, RAM and I/O resources with other users on the same server. As any other shared resources, there might be occasions in which a given user will take all the CPU and/or RAM and the server performance can suffer greatly, even a server can go down. The bad thing is that you cannot do anything about it. When on a dedicated, the CPU works only for your site. Yeah, your site can bring the server down too, but at least you have more control over the situation.
Performance As explained in the previous paragraph, when you are alone on the server all resources are allocated to your site. So a dedicated server performance cannot be compared to the performance of any other type of hosting plan.
The Downsides The Greatest downsides are that now, when you have a dedicated server you will need to manage it - configure software, apply security patches, monitor uptime, perform backups - all the regular sysadmin tasks that are being performed by the web host when you are on a shared or a VPS plan. So to be able to run a dedicated server, you must either have the necessary sysadmin skills or have the necessary money to hire a sysadmin to manage the server for you. Conclusion Dedicated servers are great. However you need to make up your choice and balance between your budget, skills and your website requirements. Some of the companies offering dedicated and managed servers include:
Well! There’s no doubt that dedicated servers have much importance in today’s web hosting world. I would say it really depends on your website requirement that you should select a dedicated server only if your website needs a keen resource (more web-space, high performance servers) and due to the highly website traffic.
web hosting review
Never get one from godaddy.com or wildwestdomains.com! worst customer service i ever had, plus they sold 40 of our domains and we were on a dedicated server. it was all explained on http://www.badspace.com!
web hosting review