4GB Memory 3GB usable

ibrahimxx · Sep 25, 2014

Hey guys

I just upgraded my Toshiba Satellite A100-906 from 1GB to 4GB(2GB x 2GB).

And the official Toshiba webpage it says 4GB maximum.

So I formated my Toshiba from Windows XP 32 bit to Windows 7 64 bit.

But when I checked the properties on my Toshiba it says 4GB (usable 3GB)

And my GPU is NVIDIA 7600 GO

How can i full use my 4GB memory?

If you guys can help me i would be very thankful

jbrown156 · Sep 25, 2014

ibrahimxx :

it is saying 3gb usable because its likely you are running a 32bit os... go to start right click on my computer and then properties and check the system type

06yfz450ridr · Sep 25, 2014

most likely being used by the gpahics card etc, you wont be able to utilize all of that most will share it for video memory but not a full GB.

mine on my work pc is 4gb( 3.68) usable

ibrahimxx · Sep 25, 2014

jbrown156 :

ibrahimxx :

it is saying 3gb usable because its likely you are running a 32bit os... go to start right click on my computer and then properties and check the system type

Just checked it again and it says 64bit

06yfz450ridr · Sep 25, 2014

jbrown156 :

ibrahimxx :

it is saying 3gb usable because its likely you are running a 32bit os... go to start right click on my computer and then properties and check the system type

he already stated he switched to a 64 bit os, thats what I first thought it was

jbrown156 · Sep 25, 2014

then in this case its allocated to the integrated graphics the laptop has.. the laptop should perform just normal however

ibrahimxx · Sep 25, 2014

that means my GPU is using 1GB from the 4GB ?

notherdude · Sep 25, 2014

jbrown156 :

But it appears to have a dedicated graphics card with its own video ram and is not using shared system RAM, I think.

jbrown156 · Sep 25, 2014

ibrahimxx :

yup it sure is .. it wont have much effect on the speed of the pc though.. it just really terrible at games

Nasir Arfat · Mar 2, 2015

32-bit Windows has an address space of 4GB. Part of that is used by system BIOSes and graphics memory.

With a 256MB graphics card about 3.3-3.5GB of RAM can be addressed and used, assuming you have 4GB fitted.

If you fit a graphics card with 1GB of memory only about 2.6-2.8GB of the RAM would be addressable and usable.

If your system RAM is greater than 4 GB you might need 64bit version windows OS.

Please check following link for detail info.

https://msdn.microsoft.com/en-us/library/aa366778%28VS.85%29.aspx#physical_memory_limits_windows_7

I hope this will help you.

Thanks...........

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