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Windows 7: W7 x64 won't see more than 3gb Ram

02 Jan 2011   #1
Diabolic

Windows 7 Ultimate x64
 
 
W7 x64 won't see more than 3gb Ram

Hi, I've seen this question asked but while I have found the explanation I can't find the solution.

I'm Running windows 7 x64 on my PC. Its an older PC. 3Ghz Pentium D. The mobo is an AOPEN i954pa-plf. So I've installed 2 2GB sticks of ram and my computer on boot, and in the bios only shows 3GB as being installed. From what I can tell this is due to the bios offset not being enabled. What I can't figure out is how to enable it.

Is this a case of the mobo being too old to get the full benefits of win7 64, and its just impossible to enable the offset to allow more than 3GB, or is there a setting I just can't find? According to the specs on the board it can handle up to 4GB, so I'd really like to squeeze as much out of this as possible-if possible.

Thanks


My System SpecsSystem Spec
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02 Jan 2011   #2
smsff7

Windows 7 Pro X64
 
 

Strange, Do you have a video card with 1GB of memory? My guess is that your video card ram is also being counted for that 4GB limit.
My System SpecsSystem Spec
02 Jan 2011   #3
Diabolic

Windows 7 Ultimate x64
 
 

No, my video card is 512mb.
My System SpecsSystem Spec
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02 Jan 2011   #4
Outlander

W7x64 Ult.
 
 

Sys Configuration/Boot/Advanced Options...Uncheck Max memory. I had your problem and for reasons beyond me that move fixed it. May not apply in your case??
My System SpecsSystem Spec
02 Jan 2011   #5
slk2k

Windows 7 x64 Ultimate RTM
 
 

How much memory does the BIOS see? Some MBs were locked to
3GB only.
My System SpecsSystem Spec
02 Jan 2011   #6
Diabolic

Windows 7 Ultimate x64
 
 

It shows just over 3gb (3145...K) everywhere. BIOS, boot screen, and system info.
My System SpecsSystem Spec
03 Jan 2011   #7
mjf

Windows 7x64 Home Premium SP1
 
 

Quote   Quote: Originally Posted by Diabolic View Post
It shows just over 3gb (3145...K) everywhere. BIOS, boot screen, and system info.
3GB = 3145***kB which shows in your BIOS
So that's probably why you have the limit.
My System SpecsSystem Spec
03 Jan 2011   #8
stormy13
Microsoft MVP

Win 7 Ultimate x64
 
 

Motherboard only supports up to 4 GB of ram,

AOpen i945Pa-PLF (Motherboards: Intel Pentium4) by AOpen -- FiringSquad Hardware Info & Web Reviews

and unless the motherboard/bios supports memory re-mapping,

The system memory that is reported in the System Information dialog box in Windows Vista is less than you expect if 4 GB of RAM is installed

Quote:
The BIOS must support the memory remapping feature. The memory remapping feature allows for the segment of system memory that was previously overwritten by the Peripheral Component Interconnect (PCI) configuration space to be remapped above the 4 GB address line. This feature must be enabled in the BIOS configuration utility on the computer. View your computer product documentation for instructions that explain how to enable this feature. Many consumer-oriented computers may not support the memory remapping feature. No standard terminology is used in documentation or in BIOS configuration utilities for this feature. Therefore, you may have to read the descriptions of the various BIOS configuration settings that are available to determine whether any of the settings enable the memory remapping feature.
then the ~3145 MB you're seeing is all you're going to get.
My System SpecsSystem Spec
03 Jan 2011   #9
mjf

Windows 7x64 Home Premium SP1
 
 

~ 3145 kB
My System SpecsSystem Spec
03 Jan 2011   #10
stormy13
Microsoft MVP

Win 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by mjf View Post
~ 3145 kB
You realize that is only around 3 MB or so.. Looks like you're getting your K, M and G mixed up,

http://egret.net/kb__mb.htm
My System SpecsSystem Spec
Reply

 W7 x64 won't see more than 3gb Ram




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