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Laptop only uses 3/4 GB RAM


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#1 G2442g

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Posted 19 January 2014 - 07:23 AM

I'm using a laptop running Windows Vista Home Premium, SP2, 32 bit.
According to my system info, my laptop has 4,00 GB RAM, but task manager only shows 3038 MB physical memory available.

How can I use the full 4,00 GB?



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#2 Allan

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Posted 19 January 2014 - 08:24 AM

Is there any problem with your system? Is it performing normally?



#3 G2442g

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Posted 19 January 2014 - 09:42 AM

As far as I´m aware of there are no further problems.

I can´t tell whether my laptop has always been doing it; I haven't used it for 2 years (bought a faster one to game with, my mother has been borrowing this one ever since).



#4 Allan

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Posted 19 January 2014 - 09:56 AM

While in theory a 32 bit OS can address 4Gb ram, that's really the ideal maximujm. The display adapter almost certainly will use at least 500Mb and your system may reserve additional space. If your system is performing well I wouldn't spend any more time thinking about it.



#5 PanickyD

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Posted 19 January 2014 - 10:06 AM

Allen is right. I've never seen a 32-bit OS be able to access a full 4GB of RAM. Until you install a 64-bit OS, you'll never be able to.

 

Here is a good page from Microsoft that explains the whole concept and some workarounds.


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#6 dc3

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Posted 19 January 2014 - 11:25 AM

The simplified version is a 32-bit Windows operating system has a Address Space which is 4GB in size.  This space has other memory allocations other than RAM.  Other critical functions include the system BIOS, motherboard resources, and memory mapped for I/O, PCI, PCI-E, and other PCI devices (cards).  Because of this a 32-bit operating system typically will only recognize between 3.3GB and 3.5GB of RAM.


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