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not all ram installed in computer showing up.


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#1 eboknight

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Posted 11 September 2010 - 11:41 AM

I have a HP Compaq dc 7600 Convertible mini tower, I upgraded my ram and all goes well until I install the last GB of ram. In the start up menu it shows all four gigs of ram, but when let it finish booting up and check my computers properties it says 2.99 GHz 3.25 GB of Ram. I have four sticks of crucial memory at one gig a piece and all running at 667MHz. I have tried moving the chips around, pulling them all and putting them in one at a time ( with computer of while inserting sticks.

I'm at a loss

Any help is greatly appreciated.

Thanks

Dave

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#2 dc3

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Posted 11 September 2010 - 11:52 AM

A 32-bit Windows operating system will not recognize the full 4GB of RAM, it will not be able to utilize the total amount because the address space is only 4GB in size, the draw from critical functions such as the system BIOS, motherboard resources, memory mapped I/O, AGP, PCI, PCI-E, and other memory allocations for PCI devices use this space as well.

Different onboard devices and different add-on cards (devices) will result in different total memory size. This means that the more PCI cards installed will require more memory resources, resulting of less memory free for other uses. Typically a 32-bit operating system will see between 3.3GB and 3.5GB of total RAM.

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#3 eboknight

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Posted 25 September 2010 - 10:05 PM

Thank you That would be my problem.

Thanks again.

Dave

#4 dc3

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Posted 25 September 2010 - 10:50 PM

Glad to be able to help.

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