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Windows 7: Win 7 only 3.25 gb ram

09 Jan 2010   #1
emilyan2010

Windows 7 Ultimate 32 bit
 
 
Win 7 only 3.25 gb ram

Hello. I installed windows 7 a week ago,updates all drivers etc. When i go to my computer at options it sais 4 gb(3.25 gb usable), but i would like to use them all. I searched the internet and it sais i should go to system configuration, to boot/advanced options, and set maximum memory to 4096 mb. I dont know if this is safe(or if it works) so I ask you if it is safe to do this(without damaging my computer), and if it doesnt work, what should i do to return to the last value(maximum memory is uncheched at advanced options, and the value is 0 inside). Thank you in advance,
Emilyan


My System SpecsSystem Spec
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09 Jan 2010   #2
Mitch656

Windows 7 Professional 64bit
 
 

I have the same issue with the same amount of Ram

its not really an issue.

The reason why it can only use 3.25gb of your ram is because you are using a 32bit OS

to use all 4gb of ram you must move to a 64bit OS
My System SpecsSystem Spec
09 Jan 2010   #3
emilyan2010

Windows 7 Ultimate 32 bit
 
 

Quote   Quote: Originally Posted by Mitch656 View Post
I have the same issue with the same amount of Ram

its not really an issue.

The reason why it can only use 3.25gb of your ram is because you are using a 32bit OS

to use all 4gb of ram you must move to a 64bit OS
Well, but before buying it, i saw on windows forum windows 7 32 bits uses 4gb ram, not 3.25, and 64 uses a lot more. Then why is it using only 3.25? Was it a false advertisement?
My System SpecsSystem Spec
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09 Jan 2010   #4
logicearth

Windows 10 Pro (x64)
 
 

Quote   Quote: Originally Posted by emilyan2010 View Post
Well, but before buying it, i saw on windows forum windows 7 32 bits uses 4gb ram, not 3.25, and 64 uses a lot more. Then why is it using only 3.25? Was it a false advertisement?
The hardware takes up the other 0.75 GB of memory. You can view this in Resource Manager. Start > type "resource" > Open Resource Manager > Memory Tab > Physical Memory. It has always been this way, always.
My System SpecsSystem Spec
09 Jan 2010   #5
Dwarf

Windows 8.1 Pro RTM x64
 
 

Hi emilyan2010 and welcome to Windows 7 Forums

A 32-bit OS can only access (address) a total of 4GB of memory space. Included in that space is your RAM and also the rest of your hardware I/O devices, which take priority.

On a typical system, excluding graphics, this accounts for about 256MB. Graphics can account for between 256MB to 768MB. These amounts are hardware dependant. Adding these together gives a typical value of 768MB (0.75GB). This amount has to be fitted into the total available address space - in effect, the area of RAM that is mapped to the same address locations will not be available for use. So we have the following:

Total Address Space (4GB) - Reserved Address Space (~0.75GB) = Available RAM Address Space (~3.25GB)

Note that the total amount of reserved address space is dependant on your hardware configuration. You can recover some of this, although not a great deal, and make it available for RAM use by disabling unused hardware in your BIOS. This is usually limited to your parallel and serial ports.
My System SpecsSystem Spec
09 Jan 2010   #6
emilyan2010

Windows 7 Ultimate 32 bit
 
 

Now I got it. I thought the system only uses 3.25 Gb, and 750 mb are useless,because it couldnt see more. Now I understand that those 750 mb are used by hardware and video memory. Thank you for your advices
Yours,
Emilyan
My System SpecsSystem Spec
09 Jan 2010   #7
Dwarf

Windows 8.1 Pro RTM x64
 
 

You're welcome, Emilyan.
My System SpecsSystem Spec
09 Jan 2010   #8
ski

windows 7
 
 

Quote   Quote: Originally Posted by emilyan2010 View Post
Now I got it. I thought the system only uses 3.25 Gb, and 750 mb are useless,because it couldnt see more. Now I understand that those 750 mb are used by hardware and video memory. Thank you for your advices
Yours,
Emilyan
FWIW, you can always install an inexpensive video card(assuming you're not a gamer) if you ever need to free up that 750MB of memory, e.g., your applications are using up all of the installed RAM causing your HD's swap file to frequently activate and slowing down your system's performance.
For example, my system has 2GB of RAM and an inexpensive ATI 4350 vid card(512MB) installed, and only a measly 1MB of RAM is reserved for the hardware with the OS having access to the remaining 1999MB.
My System SpecsSystem Spec
09 Jan 2010   #9
Pentium3 FTW

Windows 7 x86, Mac OS 8.6
 
 

Quote   Quote: Originally Posted by ski View Post
FWIW, you can always install an inexpensive video card(assuming you're not a gamer)
And assuming this computer isn't a laptop... gets a little hard to cram the video card into the case :P
My System SpecsSystem Spec
09 Jan 2010   #10
ski

windows 7
 
 

Quote   Quote: Originally Posted by Pentium3 FTW View Post
And assuming this computer isn't a laptop... gets a little hard to cram the video card into the case :P
It is possible with some laptops.
My System SpecsSystem Spec
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 Win 7 only 3.25 gb ram




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