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Windows 7: Can't see all my memory - not a 4GB limit problem.

09 Sep 2010   #1
jwalk

Windows 7 Home Premium
 
 
Can't see all my memory - not a 4GB limit problem.

I have an old HP A1030N with a PGTD1-LA (Goldfish3) motherboard and a P4 3GHz HT processor. I have an Audigy Soundblaster something-or-other sound card and an NVidia GeForce 9400GT video card. I'm running Windows 7 32-bit Ultimate.

For a long time I've been running with 1.5GB DDR2 RAM (2x256 + 2x512). I recently talked myself into upgrading, and grabbed (2) 1GB modules. Installing those with my previous 512's should give me 3GB, but I'm being told that I have only 2.37GB available.

Where's my other 600+ MB and how do I get them? Re-install?

I've Googled plenty, and all the problems I see discussed refer to the infamous 4GB/32-bit limitations. I know all about that, and I don't see where any of that applies. My motherboard supports up to 4GB RAM installed. My 3GB and the gigabyte on the video card should still fall within that limitation.




My System SpecsSystem Spec
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09 Sep 2010   #2
marsmimar

Microsoft Community Contributor Award Recipient

 
 

It seems that a portion of your RAM is still being set aside for probably your graphics card. Other possible users of memory are
System ROM
APIC(s)
Integrated PCI devices, such as network connectors and SCSI controllers
PCI cards
My System SpecsSystem Spec
09 Sep 2010   #3
jwalk

Windows 7 Home Premium
 
 

Quote   Quote: Originally Posted by marsmimar View Post
It seems that a portion of your RAM is still being set aside for probably your graphics card. Other possible users of memory are
System ROM
APIC(s)
Integrated PCI devices, such as network connectors and SCSI controllers
PCI cards
OK, fair enough. I'm not entirely sure how all that works, so I have to accept it's possible.

However, with 1.5GB RAM, I got to see and use the full 1.5GB. Why am I losing out now? How can I get it back? Can I?
My System SpecsSystem Spec
.

09 Sep 2010   #4
marsmimar

Microsoft Community Contributor Award Recipient

 
 

From what I can remember, this total installed vs. available memory issue has to do with something called memory re-mapping. Not all systems (mobos and BIOS) support re-mapping. This Microsoft KB article goes into a bit more detail:

The usable memory may be less than the installed memory on Windows 7-based computers
My System SpecsSystem Spec
09 Sep 2010   #5
jwalk

Windows 7 Home Premium
 
 

Quote   Quote: Originally Posted by marsmimar View Post
From what I can remember, this total installed vs. available memory issue has to do with something called memory re-mapping. Not all systems (mobos and BIOS) support re-mapping. This Microsoft KB article goes into a bit more detail:

The usable memory may be less than the installed memory on Windows 7-based computers
I suppose that could be the case. BIOS does, in fact, detect all the correct memory in their slots:


While Everest Ultimate running inside Windows does not:
My System SpecsSystem Spec
09 Sep 2010   #6
marsmimar

Microsoft Community Contributor Award Recipient

 
 

You could also take a look at the built in Resource Monitor. It may give a better picture of how your system is allocating your RAM.

Resource Monitor
My System SpecsSystem Spec
09 Sep 2010   #7
DocBrown

Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
 
 

Have you set Maximum Memory to zero (0) in System Configuration in the Boot Tab Then adavanced options ?


Attached Thumbnails
-maximum_memory.jpg  
My System SpecsSystem Spec
09 Sep 2010   #8
ken9122

Win7 x64 Ultimate SP1
 
 

Just a guess, but it may not like the 2 different type memory sticks. try removing the 2 512meg sticks and see if it sees all of the 2gig memory.
Ken
My System SpecsSystem Spec
09 Sep 2010   #9
stormy13
Microsoft MVP

Win 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by ken9122 View Post
Just a guess, but it may not like the 2 different type memory sticks. try removing the 2 512meg sticks and see if it sees all of the 2gig memory.
Ken
More like 3 different makes. I see two from Spectek, and 1 each from Samsung and Patriot.

Check what Doc posted first, then if that doesn't to it try it with the two 1 GB sticks as Ken suggested. If it sees and uses all 2 GB, then try it with the two 1 GB sticks and one of the 512 MB sticks and see if the full 2.5 GB is available. If it is swap the one 512 with the other and test again. You can also try putting the sticks in the slots like this,

1 GB - 1 GB - 512 MB - 512 MB
or
512 MB - 512 MB - 1 GB - 1 GB

and see if a different slot combination will get all 3 GB usable.

P.S. One small niggle, neither your video card nor the sound card are PCI-E, they are both PCI only,

Motherboard Specifications, PTGD-LA (Goldfish3) - HP Customer Care (United States - English)
My System SpecsSystem Spec
09 Sep 2010   #10
jwalk

Windows 7 Home Premium
 
 

Thanks for all the ideas - I'll try them out and post back with my findings.

Quote   Quote: Originally Posted by stormy13 View Post

P.S. One small niggle, neither your video card nor the sound card are PCI-E, they are both PCI only,

Right right... did I say otherwise?

EDIT: Oh, OK - my profile thingy. I'm not sure why that was there. I must've been dreaming that day or something.
My System SpecsSystem Spec
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 Can't see all my memory - not a 4GB limit problem.




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