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Server 2008 Ent RAM

Posted on 2008-10-22
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Last Modified: 2013-11-05
Hello all,

I have a new Windows server 2008 Enterprise installation. I have installed 8GB of ram. Only 3.3 GB of physical RAM is being recognized.
When I run an msinfo32 the amount of Installed Physical Ram is 8.0GB.

How can I get the total physical memory to be 8.0 GB?
Any help is appreciated. Thanks.

Keith  
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Question by:kwoznica
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tigermatt earned 500 total points
ID: 22779886

Is this installed on a 32-bit or 64-bit server? My guess would be this is a 32-bit system, since it is showing classic symptoms of a 32-bit environment.

A 32-bit CPU (or 64-bit CPU running a 32-bit install of an OS) can only address 2^32 bytes of RAM, a.k.a. 4GB. However, not all of this is reported - somewhere between 2.75GB - 3.5GB is actually reported and available to the system, which would explain your 'Total Physical Memory' figure being 3.25GB.

Your only two options are as follows:

1. If you have a 64-bit CPU and the 64-bit Server 2008 Enterprise DVD, you can install the 64-bit edition of the OS. A 64-bit OS on a 64-bit CPU can address 2^64 bytes of RAM, which goes into several TB if not more - a lot more than is feasible on a single server today.

2. If you cannot do this, find out if your CPU has PAE support. This feature extends a 32-bit address space to 36-bits, so you've got it, it can address 2^36 bytes of RAM, =64GB, so your 8GB would show up. See http://en.wikipedia.org/wiki/Physical_Address_Extension.

-tigermatt
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