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Windows 7: Why is only half of my RAM usable?


11 Jul 2011   #1

Windows 7 Ultimate x64
 
 
Why is only half of my RAM usable?

I have performance problems. Even though I have 4GB RAM installed physically, my harddisk runs like crazy. A moment ago, I encountered the system report below, which says that only 2GB of my RAM is usable.

What is the meaning of this?

Here is the screenshot:



My System SpecsSystem Spec
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11 Jul 2011   #2

Windows 8.1 Pro x64
 
 

Uncheck Max mem from msconfig (Windows Key+R>msconfig>Boot>Advanced options)

Post a screen shot of the Memory Tab in Resource Monitor
You can view this in Resource Monitor. Start > type "resource" > Open Resource Monitor > Memory Tab > Physical Memory.

Enable memory remap in your BIOS if it is supported
My System SpecsSystem Spec
11 Jul 2011   #3

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by yowanvista View Post
Uncheck Max mem from msconfig (Windows Key+R>msconfig>Boot>Advanced options)
It is already unchecked.

Quote   Quote: Originally Posted by yowanvista View Post
Post a screen shot of the Memory Tab in Resource Monitor
You can view this in Resource Monitor. Start > type "resource" > Open Resource Monitor > Memory Tab > Physical Memory.


Quote   Quote: Originally Posted by yowanvista View Post
Enable memory remap in your BIOS if it is supported
I'm editing BIOS now...
My System SpecsSystem Spec
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11 Jul 2011   #4

Windows 8.1 Pro x64
 
 

2053MB of your RAM is allocated to the hardware, probably to your Radeon HD4670. That amount cannot be used at all. But if you want more memory just add more RAM
My System SpecsSystem Spec
11 Jul 2011   #5

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, clean install, upgrade disc
 
 

Just to be sure that your memory is not having problems (I tend to agree with yowanavista), take memtest86
Guide to using Memtest86+ - Geeks to Go Forums
My System SpecsSystem Spec
11 Jul 2011   #6
Microsoft MVP

Win 7 Ultimate x64
 
 

Some things to try here,

Asus X58 + 6/12GB memory overclocking - detecting less memory than installed - i4memory.com - different look at memory

Quote:
2053MB of your RAM is allocated to the hardware, probably to your Radeon HD4670.
Unless there is a major hardware glitch somewhere, no it isn't.
My System SpecsSystem Spec
11 Jul 2011   #7
Microsoft MVP

Windows 7 Ultimate SP1 X64 (Windows 10, 8.1, Linux Mint, Windows XP and others in VM)
 
 

The 4670 should have it's own memory. there may be a bios setting to turn off dedicated graphics memory.
My System SpecsSystem Spec
11 Jul 2011   #8

Windows 7 Ultimate x64
 
 

My problem is solved after taking RAM out of its socket and then replugging it. I think there was a physical disconnection in the RAM socket. Now my system works fine.
My System SpecsSystem Spec
11 Jul 2011   #9

Windows 7 64 bit SP1
 
 

Quote   Quote: Originally Posted by essenbe View Post
The 4670 should have it's own memory. there may be a bios setting to turn off dedicated graphics memory.
Doesn't matter if it has its own memory. It will need PCI-e address space and will map to the upper part of the 4GB unless memory remapping is available and enabled. It doesn't need physical memory but it does need address space, which it will take away from that being used by physical RAM.

That is a huge amount of reserved ddress space though. Did you move your graphics card from one PCI-E slot to another?
My System SpecsSystem Spec
11 Jul 2011   #10

Windows 7 Pro x64 (1), Win7 Pro X64 / WinXP Pro x86 on (2)
 
 

Quote   Quote: Originally Posted by GeneO View Post
Quote   Quote: Originally Posted by essenbe View Post
The 4670 should have it's own memory. there may be a bios setting to turn off dedicated graphics memory.
Doesn't matter if it has its own memory. It will need PCI-e address space and will map to the upper part of the 4GB unless memory remapping is available and enabled. It doesn't need physical memory but it does need address space, which it will take away from that being used by physical RAM.
Just in passing, I have a 512MB HD4670 card in my ASUS P5Q3 motherboard, and it takes zero memory from my 4GB of RAM.

My System SpecsSystem Spec
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 Why is only half of my RAM usable?




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