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Rookie
Posts: 4
Registered: ‎01-06-2013
Message 1 of 4 (1,699 Views)

4 GB Memory Installed, (3 GB usable) - What does this mean?

I have a Sony VGC-LT25

Ii came with 3 GB of memory installed (1 GB,and 2GB modules)

I replaced the 1 GB module with a 2 GB module bringing the memory up to 4 GB total

On the System control panel the system shows 4GB total installed but reads (3 GB usuable)

What does this mean and is there some setting I need to change to allow for the full 4GB to be usable?

Enthusiast
Posts: 9
Registered: ‎11-22-2012
Message 2 of 4 (1,695 Views)

Re: 4 GB Memory Installed, (3 GB usable) - What does this mean?

If your OS is 32-bit XP or Vista, the system can only use 3-3.57GB of memory.

 

32-bit Windows 7 "sees" 4GB but in that case, some of the RAM may be unusable because it is reserved for graphics use.

 

Rookie
Posts: 4
Registered: ‎01-06-2013
Message 3 of 4 (1,682 Views)

Re: 4 GB Memory Installed, (3 GB usable) - What does this mean?

Thank you for responding.
My Vaio has Windows 7 on it. It was shipped with Windows Vista which I upgraded to Windows 7 a year ago. I just recently added the extra memory.
Rookie
Posts: 4
Registered: ‎01-06-2013
Message 4 of 4 (1,682 Views)

Re: 4 GB Memory Installed, (3 GB usable) - What does this mean?

And it is a 32 bit system.

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