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Windows 7: 4GB of RAM installed only showing 3GB


01 May 2009   #11

 

Quote   Quote: Originally Posted by Andypants View Post
I'm having the same problem here. Installed W7100 x64, but in my controll panel/system it shows
"Installed memory (RAM): 4.0GB (3.0GB usable)"
Quote   Quote: Originally Posted by Andypants View Post
But would PAE not be automatically enabled in 64bit Windows 7?
I had PAE enabled when I was still on Vista 32, made no difference, also only saw 3.2G
If you'd update your system specs underneath your nic in every post we'd be able to help better.

*I* am betting you're using onboard video, and it is using your system RAM for VideoRAM....

Also, 32bit will not allow for more than ~3-3.5 *ever* b/c the memory allocations of things like the BIOS< Cache, etc will all be required to establish themselves in the same 4 GB you have installed - thereby not allowing you to use however much they use.

My System SpecsSystem Spec
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01 May 2009   #12

Windows 7 Ultimate x64, XP Mode, W8.1 Preview VM - 7 Pro x64 second remote tower
 
 

With Vista SP1 allowed Windows to report all 4gb were installed in the system information there while still not seeing over 3.581 or close actually available. The 32bit kernel then limits anything more where the rest is then mapped out to hardwares. If you have a 512mb or larger video card Windows would take some to share with that.

The 64bit edition doesn't need the PAE since it sees a different process for mapping memory addresses to begin with placing more information in the active ram with less being swapped out to the drive. The 32bit Home Premium here sees 4gb in the system info and the 3.581gb as available less what is taken up by Windows and startups. But I also have the beta for SP2 on not just the SP1.
My System SpecsSystem Spec
12 May 2009   #13

Windows 7 RC 7100 64 bit
 
 

The "reserved for hardware" answer is the same one I got when running 32 bit Vista with 4GB a year ago. What is the advantage of using a 64 bit OS with 4Gb ram then? And why are there so many references to win32 when you generate a system health report in Windows 7 64 bit? It looks like this:

OS Checks
Operating System Info

Query
root\cimv2:SELECT*FROM Win32_OperatingSystem
root\cimv2:SELECT*FROM Win32_ComputerSystem

--- or this further down the list ---

System Services

Query
root\cimv2:SELECT __Relpath, Name, Caption, Description, DisplayName, PathName, Started, ExitCode, State, ServiceSpecificExitCode FROM Win32_Service

with every available/running windows service listed as a "Win32" service after it.

I upgraded to Windows 7 64 bit (which it reports as OS in other places) from Vista Home Premium 64 bit. Here are machine specs.

Gigabyte GA-P35-DS3L (latest bios)
Core 2 Duo E6600
4GB G-Skill RAM (2x2GB)
HTO CLARO Sound
Intel Gigabit CT NIC
EVGA Nvidia 260 GTX 216 core Video

I DO NOT HAVE A MEMORY REMAP OPTION IN MY BIOS and 4GB was detected and used just fine in Vista 64 bit.
My System SpecsSystem Spec
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12 May 2009   #14

Windows 7 Professional, Windows Longhorn 4074
 
 

Maybe your BIOS isn't doesn't have support for more than 3GB of RAM. Mine can't support more than 2GB
My System SpecsSystem Spec
12 May 2009   #15

Windows 7 Ultimate x64, XP Mode, W8.1 Preview VM - 7 Pro x64 second remote tower
 
 

The reason for seeing references to 32bit are simply how the 64bit Windows emulates the 32bit environment. Otherwise you wouldn't be able to see any 32bit game or program run or even install on the 64bit editions.

Likewise the old 32bit Windows like 98/ME and larer XP displayed their own backward support for 16bit apps. When looking at the root of C when booted in the 64bit Windows note the Program Files(x86) folder seen beneath the normal Program Files used for the 64bit applications. That will contain the folders for 32bit installations there.
My System SpecsSystem Spec
22 May 2009   #16

Windows 7 RC 7100 64 bit
 
 
**FIX**

I figured it out. I'm not sure if anyone is still reading this post but here is cause, effect and solution. The memory that was being shown as unavailable WAS being used as a shadow to video card memory. A fresh install will remedy the problem because it uses the WDDM 1.1 video card drivers as a default (the ones available from windows update). The newest drivers (at the time I upgraded) from Nvidia would cause this quirky bug when installed on an upgraded version of Windows 7 64-bit. Uninstalling the Nvidia drivers and letting Windows 7 install its own from the windows update site fixed the problem for me. I have since done a fresh install anyway and the whole system seems to be working better, but I thought some still might want to hear about this fix.
My System SpecsSystem Spec
22 May 2009   #17

Windows 7 Professional, Windows Longhorn 4074
 
 

Quote   Quote: Originally Posted by sylar365 View Post
I figured it out. I'm not sure if anyone is still reading this post but here is cause, effect and solution. The memory that was being shown as unavailable WAS being used as a shadow to video card memory. A fresh install will remedy the problem because it uses the WDDM 1.1 video card drivers as a default (the ones available from windows update). The newest drivers (at the time I upgraded) from Nvidia would cause this quirky bug when installed on an upgraded version of Windows 7 64-bit. Uninstalling the Nvidia drivers and letting Windows 7 install its own from the windows update site fixed the problem for me. I have since done a fresh install anyway and the whole system seems to be working better, but I thought some still might want to hear about this fix.
Don't worry, we still follow it . Anyway, that sounds like it would work. I would suggest trying this.
My System SpecsSystem Spec
23 May 2009   #18

Windows 7 Ultimate 64 BITS
 
 

I create a topic with the same problem, and our friend Enzo fix his problem doing the same thing...a fresh install

Problem using 4gb in 64 bits

When i get home i'll do a fresh install in my computer and post here if it works
My System SpecsSystem Spec
25 May 2009   #19

Windows 7
 
 

Hi all,

I've done a fresh install of Windows 7 32bit but its only showing 2Gb instead of 3Gb RAM in both the BIOS and Windows. However CPUZ is showing 3GB RAM which is very strange! My motherboard is an ASUS P6T with the latest BIOS update.

Any advice will be much appreciated!
My System SpecsSystem Spec
23 Dec 2009   #20

win7
 
 

if you don't have this option for remap memory in bios?what you can do i tried default seetings dint\t work..
My System SpecsSystem Spec
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 4GB of RAM installed only showing 3GB




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