How much virtual memory is necessary in Windows 7?

As a general rule of thumb, you should have double the amount of virtual memory as you do ram. So if you have 8GB's of ram, you should allocate 16GB's of virtual memory. However my current system (Windows 7 8GB's of RAM; used for programming and gaming) has 4GB's of virtual memory available, but it usually only uses about 1GB max. That's because typically developers don't prefer to store data in virtual memory, rarely is it necessary. With ram being so cheap, developers have forgotten about optimization and instead dump everything into RAM.

You should also configure Windows to clear the virtual memory on shutdown to clear up that space. This will add a minute or so to the shutdown process but is good for security and performance.

Recommended for casual computing: 2 - 4GB's
Recommend for casual gaming (D3D/OGL): 5GB's
Recommended for extreme gaming/modeling: 10GB's 

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