Hello,

That depends of the edition of your Windows 7.

Please note that increasing your RAM ammount does not mean that you increase performance. Please check the ammount of RAM needed by your applications before adding new RAM.

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http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx

The 32 bit versions of Windows desktop OSes are limited to 4 GB at most. Home Premium X64 is limited to 16 GB. The 64 bit Professional, Enterprise, and Ultimate all support 192 GB.

32 bit application software uses up to 2 GB of RAM (3 GB for large memory aware applications). More than 4GB of RAM can be useful if you wish to have multiple 32 bit applications running at the same time. 64 bit applications are useful for tasks that must access lots of memory (finite element analysis, video processing, etc.).

As RAM is relatively cheap at the moment, even if you waste it, you won't be wasting much money.

http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx

The 32 bit versions of Windows desktop OSes are limited to 4 GB at most. Home Premium X64 is limited to 16 GB. The 64 bit Professional, Enterprise, and Ultimate all support 192 GB.

32 bit application software uses up to 2 GB of RAM (3 GB for large memory aware applications). More than 4GB of RAM can be useful if you wish to have multiple 32 bit applications running at the same time. 64 bit applications are useful for tasks that must access lots of memory (finite element analysis, video processing, etc.).

As RAM is relatively cheap at the moment, even if you waste it, you won't be wasting much money.

Hello,

That depends of the edition of your Windows 7.

Please note that increasing your RAM ammount does not mean that you increase performance. Please check the ammount of RAM needed by your applications before adding new RAM.

Microsoft Student Partner 2010 / 2011
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Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration
Microsoft Certified Technology Specialist: Windows 7, Configuring
Microsoft Certified Technology Specialist: Designing and Providing Volume Licensing Solutions to Large Organizations
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In the last episode of
<c1797be6-b91a-4ff6-9609-eadc7615ee13@communitybridge.codeplex.com>,
bobkn said:

32 bit application software uses up to 2 GB of RAM (3 GB for large memory aware applications)

Strictly speaking, a /LARGEADDRESSAWARE compiled running in a x64
environment actually has access to 4GB of private address space rather
than the 3GB limit in 32-bit OS flavours.