7,90 GB usable out of 8,00 GB

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athlon7750

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Jan 1, 2014
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Happy New Year!

I have recently installed an Asus M5A99X motherboard, with an AMD FX-6300 CPU, and 8GB Kingston HyperX RED memory@1600 MHz.

In Windows 8.1 system properties shows that I have 8,00 GB of memory installed but only 7,90 GB are usable. Resource monitor shows me that 103 MB are "hardware reserved".

Given that this motherbord doesn't have an integrated GPU, what could be using those 103 MB?

Thank you.
 
Solution
USAFRet


Other functions on the motherboard, etc. That is completely normal.
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USAFRet

USAFRet

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Mar 16, 2013
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Other functions on the motherboard, etc. That is completely normal.
 
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Solution
symsus

symsus

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Dec 10, 2013
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make sure the max memory is unchecked

This is expected behavior on computers that are running Windows 7. The reduction in available system memory depends on the configuration of the following:

The devices that are installed in the computer and the memory that is reserved by those devices
The ability of the motherboard to handle memory
The System BIOS version and settings
The version of Windows 7 that is installed (For example, Windows 7 Starter Edition only supports 2 GB of installed memory.)
Other system settings

For example, if you have a video card that has 256 MB of on-board memory, that memory must be mapped within the first 4 GB of address space. If 4 GB of system memory is already installed, part of that address space must be reserved by the graphics memory mapping. Graphics memory mapping overwrites a part of the system memory. These conditions reduce the total amount of system memory that is available to the operating system.
 
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