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Windows 7: Accessing 4 gig of RAM


09 Feb 2010   #1

Windows 7
 
 
Accessing 4 gig of RAM

My Lenovo Y710 has 4 gig of RAM installed, but Vista, of course, only used 3 gig. I thought when I upgraded to Windows 7 (32bit) that it would use all 4 gig, but system information says it's still only using 3 gig. Is there a setting I can change or perhaps a BIOS upgrade that will cause the machine to use all 4 gig of RAM.

Thanks in advance,
John P. Sparkman


My System SpecsSystem Spec
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09 Feb 2010   #2

Windows 7 64-bit
 
 

32-bit OS(s) can only addressed roughly 3.5gb of ram. 64-bit can use all 4gb. However if you have a embedded video card, it will take some of that memory.
My System SpecsSystem Spec
09 Feb 2010   #3

Win7 Home Premium 64x
 
 

The model Y710 has the Mobile Intel GM45 Express integrated graphics chipset, so the ram will also be used for this.

I don't know though if it will still use the extra non-used mem. if the graphics chip is using 512, the system might still be able to use 3.2g (I think this was the limit....not sure)

Also the limit is to it being 32bit. but the system might report it differently than what is available. so the system might say 3.0, but it actually has 3.2
My System SpecsSystem Spec
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09 Feb 2010   #4
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

There are many system functions that need address space and/or RAM. And 32bit has only 4gb of address space. Read this for details: Maximum Memory in 32-bit Windows Vista : Windows Vista and Windows 7 Help
My System SpecsSystem Spec
09 Feb 2010   #5
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote:
so the system might say 3.0, but it actually has 3.2
If it says 3.0. it is 3.0 - not anything else.
My System SpecsSystem Spec
09 Feb 2010   #6

Win7 Home Premium 64x
 
 

thanks whs, I just read the article. I remebered something about the numbers coming up differently. The instance was that the BIOS reports all 4mb, but the system does not. Very good article.
My System SpecsSystem Spec
09 Feb 2010   #7
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote:
The instance was that the BIOS reports all 4mb, but the system does not
The BIOS and the OS are two pairs of shoes. The BIOS is pretty dumb and does not know a lot.
My System SpecsSystem Spec
09 Feb 2010   #8

Windows 7 Ultimate x86-64
 
 

Quote   Quote: Originally Posted by whs View Post
Quote:
The instance was that the BIOS reports all 4mb, but the system does not
The BIOS and the OS are two pairs of shoes. The BIOS is pretty dumb and does not know lot.
The OS does rely on the BIOS for hardware info. Yes, in a 32 bit OS, 2GB is for the apps and 2GB for windows. All available hardware has to be mapped into the address space so its always less depending on what is in the machine.
My System SpecsSystem Spec
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 Accessing 4 gig of RAM




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