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Max amount of RAM Win7 will reconize

Last response: in Windows 7
November 30, 2009 1:31:15 AM


I am upgrading to the Win7 64bit, what is the maximum amount of RAM it will recognize.

Thank You
November 30, 2009 1:37:57 AM


thats right. terrabytes.
November 30, 2009 1:47:53 AM

you gotta be kidding????
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a c 215 $ Windows 7
November 30, 2009 1:51:46 AM

Actually it's 192 Gigabytes. The maximum amount of addressable ram in a 64 bit environment is 16EB (yes, Exabytes), but Microsoft limited Windows 7 to 192GB.
a c 372 $ Windows 7
November 30, 2009 1:52:43 AM

192 is on the money!i have 16 in my optiplex!
November 30, 2009 1:55:07 AM

you run with 16 gig of ram???? wow ok something to consider
November 30, 2009 2:01:27 AM

now i have an article in one of my mags that says 8tb (i believe thats about vista though)

are they just wrong?

a c 215 $ Windows 7
November 30, 2009 2:06:36 AM

Not sure where they are getting that number from. The maximum for Vista was 128GB. These limits are very widely published... you can find them almost instantly with a quick Google search.
a c 372 $ Windows 7
November 30, 2009 2:47:28 AM

prophecy is right!
a b $ Windows 7
November 30, 2009 9:37:07 AM

Also depends on the Windows 7 version

Starter: 2GB
Home Basic: 8GB
Home Premium: 16GB
Everything else: 192GB

Of course that's ignoring the 4GB addressing limit on 32-bit systems
November 30, 2009 11:42:33 AM

Kinda hard to argue with a Microsoft link! 16 GB it is! (for my version at least)
a c 209 $ Windows 7
November 30, 2009 3:45:57 PM

The limits in Windows are a reflection of limitations in the CPU chips themselves. Even if you use a 64-bit CPU chip, the page tables and address lines on the FSB limit the amount of memory that can be connected to around 40 bits or so of memory addressing, depending on the CPU.

For example, Core 2 processors are limited to 8GB of physical memory, Core i7 9xx / Xeon W35xx CPUs are limited to 64GB, and Xeon W55xx CPUs are limited to 192GB.