Installed Windows 7 64 bit - 4 GB / 3 GB usable, whereas with Windows Vista 64-bit - 4 GB usable

Hello
I have the Asus N70SV B1.

Specifications: (http://www.asus.com/Notebooks/Multimedia_Entertainment/N70Sv/#specifications)

No problems with Windows Vista 64 bit, recognizing the 4 GB of RAM. After the upgrade to Windows 7 64-bit 4 GB installed / usable RAM problem / 3 gb. I also checked the following.

1. I am running windows 7 64 bit, NOT 32 bit, I wouldn't be able to run Adobe After Effects® CS5.5 and Adobe first® Pro CS5.5 elsewise.
2. the unusable 1 GB of RAM is not used by the operating system, it's hardware reserved
3. the video card Nvidia GT 130 m 1 GB, shouldn't need that RAM - it certainly didn't on the factory installed Windows he dedicated RAM.
4. I tried disabling and enabling msconfig - boot - Max memory settings, no option solves the problem.
5. He has no option of memory in the BIOS settings to disable the cache in memory / memory the occultation.

* I had to use the 64-bit of Windows Vista sound drivers work correctly with Windows 7 64 bit. So I thought that the version of bios or Vista 64 bit can thus solve the problem usable 4 / 3 gb.

* Yes, I have flashed the bios to Windows Vista 64-bit and that still does not solve the problem. Although the system seems faster, it still shows only 3 GB usable.

There should not be a problem with this bios version seen only with the 64 bit Vista OS recognized all 4 GB.  I am confused and have no idea where to go from here.

Please help.

Hello

 
I suggest you to contact the manufacturer of the computer for help.
 
Thank you!

Tags: Windows

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