what is max memory vista can take?

* 32-bit versions of Windows Vista Home Basic, Home Premium, Business, Enterprise, and Ultimate: 4GB
* 32-bit Windows Vista Starter: 1GB
* 64-bit versions of Windows Vista Home Basic: 8GB
* 64-bit versions of Windows Vista Home Premium: 16GB
* 64-bit versions of Windows Vista Business, Enterprise, and Ultimate: 128GB

Full info:

http://msdn.microsoft.com/en-gb/library/aa366778.aspx
 
Just adding a bit of information regarding 32-bit Operating Systems and the maximum amount of physical memory they can address. Even though you may read that a 32-bit Operating System memory limit is 4GB, in reality, it is actually slightly less. This is because, things like the BIOS, PCI-Express, graphics cards etc need to be mapped into the same address space as that of the physical RAM and since it is limited to 4GB, a 32-bit Operating System will never address all of that 4GB of RAM that you have installed.
 
Any idea why even though a PC I built for someone has 64-bit vista home prem installed and 4GB of memory it is only showing 3 and a bit as if it was 32-bit? I thought it would just be "plug and play".

Ta.
 
Wonder If we will ever need 128gb of mem. I have 8gb in my system, and im not expecting anything will need more then that for a good 4-5yrs?
 
Depends what you are doing.
One of the new servers that has been ordered at work is a quad cpu (all intel quads) with 64gig of ram :D

Can't wait to have a play with that!
 
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