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===Hardware Requirements of the SME Server===

===Hardware Requirements of the SME Server===

{{warning box|Version 8.0 of SME Server is based on CentOS 5, version 9 is based on CentOS 6.5. CentOS 5 does not support i586 architecture and as such SME server 8 and SME server 9 are not compatible with i586 architecture.}}

{{warning box|Version 10.0 of SME Server is based on CentOS 7, version 9 is based on CentOS 6.5. SME server 10 and SME server 9 are not compatible with i586 architecture.}}

The hardware requirements of the SME Server are modest compared with other server software available today. However, because of its critical role in your office, selecting an appropriate host computer is important. The hardware requirements of the host computer depend on such things as the number of users on your network, whether you plan to use the proxy server on the server, and the speed of your Internet connection.

The hardware requirements of the SME Server are modest compared with other server software available today. However, because of its critical role in your office, selecting an appropriate host computer is important. The hardware requirements of the host computer depend on such things as the number of users on your network, whether you plan to use the proxy server on the server, and the speed of your Internet connection.

When you consider the requirements, please be aware of the following notes:

When you consider the requirements, please be aware of the following notes:

* The server ships with the remote access services disabled by default. Enabling webmail will increase the resource requirements of your server, in particular the memory requirement. Other remote access services, such as SSH and PPTP, are also processor-intensive. You should consider a fast processor speed if you intend to make significant use of these services.

* The server ships with the remote access services disabled by default. Enabling webmail will increase the resource requirements of your server, in particular the memory requirement. Other remote access services, such as SSH and PPTP, are also processor-intensive. You should consider a fast processor speed if you intend to make significant use of these services.

* The server should work with any i686 compatible CPU that can run Centos 5 for SME Server 8 or Centos 6 for Sme Server 9

* The server should work with any x86-64 compatible CPU that can run Centos 7 for SME Server 10

* The amount of available RAM is one of the most important considerations for server performance as it reduces the load on the disks. If a tradeoff is required, extra RAM will usually be more beneficial than a faster CPU.

* The amount of available RAM is one of the most important considerations for server performance as it reduces the load on the disks. If a tradeoff is required, extra RAM will usually be more beneficial than a faster CPU.

* For a dedicated connection in server and gateway mode, your server requires two ethernet adapters (also called network adapters or network interface cards). For a dialup connection or server-only mode, one ethernet adapter is needed.

* For a dedicated connection in server and gateway mode, your server requires two ethernet adapters (also called network adapters or network interface cards). For a dialup connection or server-only mode, one ethernet adapter is needed.

====4.2. Recommended Hardware Requirements====

====4.2. Recommended Hardware Requirements====

The following information is what we would suggest is the recommended minimum to utilize all the features of SME Server 9.0. How many users this configuration will support depends on how heavily the server will be utilized, but should be sufficient for at least 25 users.

The following information is what we would suggest is the recommended minimum to utilize all the features of SME Server 10. How many users this configuration will support depends on how heavily the server will be utilized, but should be sufficient for at least 25 users.