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Windows 7: 64-bit system finds only 3328 MB RAM

30 Sep 2015   #1
higgins

Windows 7 x64
 
 
64-bit system finds only 3 GB RAM with 5 GB installed

Hi all!

Weird issue with this setup:
MSI P35 Platinum Combo
Intel E8200 CPU
2x2GB DDR2 RAM
dedicated graphics card

BIOS shows recognizes 4096 MB RAM, but shows only 3328 MB as usable (yes, that number is from BIOS, too).

Best tip I found was to enable Memory Remap, but I can't find such option. It has some weird BIOS where I can change voltages and stuff. I've never really dealt with OC'ing.

I don't have another stick handy to see if the cap holds with added RAM.

Any ideas how to get the full RAM into use?


My System SpecsSystem Spec
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30 Sep 2015   #2
fireberd

Windows 10 64 bit
 
 

Generally its around 3.5GB of useable out of 4GB of RAM. A 64 bit OS uses a tad bit more memory than a 32 bit OS and may account for the extra RAM usage.
My System SpecsSystem Spec
01 Oct 2015   #3
higgins

Windows 7 x64
 
 

Quote   Quote: Originally Posted by fireberd View Post
Generally its around 3.5GB of useable out of 4GB of RAM. A 64 bit OS uses a tad bit more memory than a 32 bit OS and may account for the extra RAM usage.
So, this allocation happens at BIOS level? As I said, BIOS claims I have usable 3328 MB.
My System SpecsSystem Spec
.

01 Oct 2015   #4
fireberd

Windows 10 64 bit
 
 

I've never seen that in a BIOS. I missed that part.
To add, if its not showing the correct amount in the BIOS, it has nothing to do with 64 bit or 32 bit OS. Maybe a BIOS reset will fix it.
My System SpecsSystem Spec
02 Oct 2015   #5
higgins

Windows 7 x64
 
 

I added 1GB of memory. BIOS shows the 5120 MB correctly, and at the same time, still shows only 3328 MB as usable.

E8200 is 64-bit as per Intel's website.


Attached Thumbnails
64-bit system finds only 3328 MB RAM-wp_20151002.jpg  
My System SpecsSystem Spec
02 Oct 2015   #6
fireberd

Windows 10 64 bit
 
 

Did you try the BIOS reset?
My System SpecsSystem Spec
03 Oct 2015   #7
Alejandro85

Windows 7 Ultimate x64
 
 

This seems incredibly similar to this other post:
windows 7 - Why does my sytem only uses 3.2GB of my 4GM RAM? - Super User

In short, it's possible to be a limitation on the motherboard rather than Windows itself. Even though Windows 64 bits hasn't the ridiculous 4GB arbitrary limitation of the x86 version, it's still bound to the hardware limits and maybe other hardware is using that address space for its own purpose.
My System SpecsSystem Spec
06 Oct 2015   #8
higgins

Windows 7 x64
 
 

Quote   Quote: Originally Posted by fireberd View Post
Did you try the BIOS reset?
Pulled the plug. Took out the CMOS battery. Held the power button down for 20 seconds. Didn't to the jumper reset. Nothing changed.

Quote   Quote: Originally Posted by Alejandro85 View Post
This seems incredibly similar to this other post:
windows 7 - Why does my sytem only uses 3.2GB of my 4GM RAM? - Super User

In short, it's possible to be a limitation on the motherboard rather than Windows itself. Even though Windows 64 bits hasn't the ridiculous 4GB arbitrary limitation of the x86 version, it's still bound to the hardware limits and maybe other hardware is using that address space for its own purpose.
I don't think it's either. According to the mobo manual, it recognizes up to 4GB DDR3 or up to 8GB DDR2 memory, so, it shouldn't be a hardware limitation, especially given that I use DDR2.

I have currently 5GB RAM installed and BIOS still shows 3328MB usable. With 4GB RAM it showed 3328MB usable, too, and as such, I'm ruling out the GPU use that other guy had trouble with. The GPU address should take away a fixed amount, not set a cap.
My System SpecsSystem Spec
08 Oct 2015   #9
higgins

Windows 7 x64
 
 

*bump*
My System SpecsSystem Spec
08 Oct 2015   #10
malwarecide

Windows 7 Ultimate 64bit Service Pack 1
 
 

it depends on manufacturers specs of RAM
My System SpecsSystem Spec
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 64-bit system finds only 3328 MB RAM




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