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Windows 7: x64 Win7 is reporting only 3GB out of 4GB RAM

10 Mar 2010   #11
asuh

Windows 7 RTM
 
 

Quote   Quote: Originally Posted by Frostmourne View Post
Its not the motherboard, its the hardware. Do you have an integrated GPU, any add-on cards? And is 7 x86-64 or x86? If its the second one, 7 can only access 3GB or so. If its 64-bit, it will depend on the hardware installed.
The title of the post stated it was x64.

I have a dedicated GPU, XFX 8800GS, that shouldn't require extra RAM AFAIK.


My System SpecsSystem Spec
.
10 Mar 2010   #12
DreemWarrior

Windows 7 ultimate X64
 
 

Quote   Quote: Originally Posted by asuh View Post
I'm a bit confused why it's saying this. All the RAM is PC6400 and it's compatible with my machine.

I see this when I go to System properties (right-click Computer and properties). Beside the Installed Memory (RAM) label, it says 4.00 GB (3.00 GB usable).

Very strange. Hopefully it's just a tiny mistake?
Just to calrify: you are running x64 right?
What edition?



The maximum RAM limitation for Windows 7 32-bit editions is 4GB.

Windows 7 64-bit editions vary in the amount of memory that can be addressed, depending on the edition of the operating system.

The maximum RAM limits for the different editions of Windows 7:
Starter8GBHome Basic8GBHome Premium16GBProfessional192GBEnterprise192GBUltimate192GB

Starter-8Gb
Home Basic-8Gb
Premium -16Gb
Pro-192Gb
Enterprise-192Gb
Ultimate-192Gb

Starter8GBHome Basic8GBHome Premium16GBProfessional192GBEnterprise


192GB
Ultimate192GB
Have you had any crashes lately?
You may try doing a system repair with your Win7 disk. I'll get back to you as soon as I can.
My System SpecsSystem Spec
10 Mar 2010   #13
Frostmourne

Windows 7 Ultimate x86-64
 
 

Quote   Quote: Originally Posted by asuh View Post
Quote   Quote: Originally Posted by Frostmourne View Post
Its not the motherboard, its the hardware. Do you have an integrated GPU, any add-on cards? And is 7 x86-64 or x86? If its the second one, 7 can only access 3GB or so. If its 64-bit, it will depend on the hardware installed.
The title of the post stated it was x64.

I have a dedicated GPU, XFX 8800GS, that shouldn't require extra RAM AFAIK.
What other expansion cards? RAM in dual channel? Seated properly? Nothing on the gold edges of the DIMMs?
My System SpecsSystem Spec
.

10 Mar 2010   #14
DreemWarrior

Windows 7 ultimate X64
 
 

SHEESH Yall are quick on the draw.....
My System SpecsSystem Spec
10 Mar 2010   #15
asuh

Windows 7 RTM
 
 

Quote   Quote: Originally Posted by DreemWarrior View Post
Just to calrify: you are running x64 right?
What edition?
Ultimate.

Quote   Quote: Originally Posted by DreemWarrior View Post
Have you had any crashes lately?
You may try doing a system repair with your Win7 disk. I'll get back to you as soon as I can.
No crashes. No need to do system repair.
My System SpecsSystem Spec
10 Mar 2010   #16
asuh

Windows 7 RTM
 
 

Quote   Quote: Originally Posted by Frostmourne View Post
Quote   Quote: Originally Posted by asuh View Post
Quote   Quote: Originally Posted by Frostmourne View Post
Its not the motherboard, its the hardware. Do you have an integrated GPU, any add-on cards? And is 7 x86-64 or x86? If its the second one, 7 can only access 3GB or so. If its 64-bit, it will depend on the hardware installed.
The title of the post stated it was x64.

I have a dedicated GPU, XFX 8800GS, that shouldn't require extra RAM AFAIK.
What other expansion cards? RAM in dual channel? Seated properly? Nothing on the gold edges of the DIMMs?
No other expansion cards. 2GB(1GBx2) of RAM in dual channel, and 2GB (2GBx1) alone. All seated properly.
My System SpecsSystem Spec
10 Mar 2010   #17
Frostmourne

Windows 7 Ultimate x86-64
 
 

Its the RAM, I'd replace it with a single 4GB kit (2x2GB) - are they from the same manufacturer? Same timings? Same frequency?
My System SpecsSystem Spec
10 Mar 2010   #18
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by Frostmourne View Post
Its the RAM, I'd replace it with a single 4GB kit (2x2GB) - are they from the same manufacturer? Same timings? Same frequency?
Why would you do that. The 4GBs are properly reported - only not all useable. So there must be someone that's using the 1GB since Resource Monitor reports 1GB as Hardware reserved.
My System SpecsSystem Spec
10 Mar 2010   #19
DreemWarrior

Windows 7 ultimate X64
 
 

Here is the issue...


"If you are running 64-bit Windows, you may have to live with it. Depending on your motherboard's chipset, your system may support memory remapping. If so, you will be able to use all 4GB of RAM. Detailed:
Due to an architectural decision made long ago, if you have 4GB of physical RAM installed, Windows is only able to report a portion of the physical 4GB of RAM (ranges from ~2.75GB to 3.5GB depending on the devices installed, motherboard's chipset & BIOS). "
Read more....
TabBlogger : The 3GB-not-4GB RAM problem

Hope this helps explain the memory issue for you.
My System SpecsSystem Spec
10 Mar 2010   #20
asuh

Windows 7 RTM
 
 

Quote   Quote: Originally Posted by DreemWarrior View Post
Here is the issue...


"If you are running 64-bit Windows, you may have to live with it. Depending on your motherboard's chipset, your system may support memory remapping. If so, you will be able to use all 4GB of RAM. Detailed:
Due to an architectural decision made long ago, if you have 4GB of physical RAM installed, Windows is only able to report a portion of the physical 4GB of RAM (ranges from ~2.75GB to 3.5GB depending on the devices installed, motherboard's chipset & BIOS). "
Read more....
TabBlogger : The 3GB-not-4GB RAM problem

Hope this helps explain the memory issue for you.
Memory mapping, eh? I'll check my BIOS and see what's going on there. Thanks for the info.
My System SpecsSystem Spec
Reply

 x64 Win7 is reporting only 3GB out of 4GB RAM




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