How can we set the Maximum ram for SQL Server 2008 R2

Hi Experts
How can we set the maximum ram for SQL Server 2008 R2?
Is it in the settings?  How do I do this?  

Thanks in advance.  
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Vitor MontalvãoMSSQL Senior EngineerCommented:
By default each SQL Server instance is using all the available RAM in the server.

To change the memory configuration, go to SSMS and right-click on the instance name and chose Properties, then Memory. You'll be able to set the new values. No restart is needed.
mainrotorAuthor Commented:
Is it common for SQL Server to use 40% to 50% of CPU?
To set a fixed amount of memory

1.In Object Explorer, right-click a server and select Properties.

2.Click the Memory node.

3.Under Server Memory Options, enter the amount that you want for Minimum server memory and Maximum server memory.

Use the default settings to allow SQL Server to change its memory requirements dynamically based on available system resources. The default setting for min server memory is 0, and the default setting for max server memory is 2147483647 megabytes (MB). The minimum amount of memory you can specify for max server memory is 16 MB.

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Vitor MontalvãoMSSQL Senior EngineerCommented:
Is it common for SQL Server to use 40% to 50% of CPU?
Depends. There's no rule.
How many processors exists? How many of them are configured to SQL Server use? How are the other resources (Memory, disk, network)? What kind of operations are on the database? How many concurrent connections?
Vitor MontalvãoMSSQL Senior EngineerCommented:
Wondering what the accepted solution has different than mine, specially because the words aren't even from the Expert who posted it.
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Microsoft SQL Server 2008

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