ASRock FM2A75-DGS // RAM Issue

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1
I have a question about my ram as I am currently at a loss as to what to do. Any help would be much appreciated. I have the G.SKILL Ares Series 8GB (2 x 4GB) RAM sticks, and I am only able to get about 3.4GB of RAM while the rest is listed as hardware reserved under resource monitor. My Bios has been updated to the latest version. 2.10 
OS:                  Windows 7 64bit 
Motherboard:   ASRock FM2A75M-DGS 
Processor:       AMD A10-5800k Trinity 3.8GHz  
Memory:           G.SKILL Ares Series 8GB( 2 x 4GB) 
Power Supply:  CORSAIR Builder Series CX500 500W ATX12V v2.3 

Both Sticks of ram are recognized in BIOS. 
 
2

Good sir, what OS are you using? Is it windows 7 32 bit?

3

It is Windows 7 64 bit.

4

I found this good sir, take a look: http://support.microsoft.com/kb/978610

5

Thank you.

The only thing I have not tried is enabling memory remapping as I was unable to locate that feature if it exists on this board. I have even tried running the computer with either of the 2 sticks of ram I have individually.
 

6

Maybe the 5800k eats up memory, it does have a powerful GPU in it. For example the Intel HD3000 will pull 1.1gigs of ram out of the ram pool  and list it as reserved(reserved for the GPU), since the 5800k is leaps and bounds more powerful then the HD3000 my guess is it uses large amount of ram. Can you check in your BIOS and look too see if you can adjust the RAM consumption of your GPU? If you can manually adjust how much ram your GPU uses in BIOS, you can see if that is where all your ram is going.

7

Yes I was able to locate this in the past. It gives me options up to 512mb then auto- But still had the problem.