Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: 64 bit Windows only recognising 4GB of RAM.

05 Mar 2011   #1
Floydian42

Windows 7 Home Premium 64bit
 
 
64 bit Windows only recognising 4GB of RAM.

Hi All

I am guessing this is going to be a stupid question, so I do apologise in advance.

I have installed a full version of Home Prem 64 bit, but it only seems to want to detect 4GB of RAM. I only have 5GB installed at the moment, so it is not a great deal, but it is still confusing me.

Another strange part is that although it seems to be a 64bit install it looks like it has been set-up as a x86 not an x64 system.

Does this make any sense?

I have attached a few screen shots to show what I can see.

Thanks for your help, and again sorry if it is an obvious one, I am new to 7.




Attached Thumbnails
64 bit Windows only recognising 4GB of RAM.-win7_64bit_info.png   64 bit Windows only recognising 4GB of RAM.-win7_64bit_x86.png  
My System SpecsSystem Spec
.
05 Mar 2011   #2
DocBrown

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

Welcome Floydian42

Looks like this installed as X64 per your 2 screen shots. You will have 2 Program files in x64 !
The 1st is for the x64 programs & the 2nd (x86) is for 32 bit programs that run in the win7 64bit.

Is this a Laptop or Desktop ?
My System SpecsSystem Spec
05 Mar 2011   #3
Floydian42

Windows 7 Home Premium 64bit
 
 

I see, so the reason I am not seeing the x64 program files, is because I have no 64 bit programs installed?. That make sense. But what about the 4GB of ram limit?

And its a desktop
My System SpecsSystem Spec
.

05 Mar 2011   #4
DocBrown

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

Do you have onboard Video or a Video card in a slot ?

Also check for maximum memory set to Zero ( 0 )

Start System Configuration Click on Boot tab Advanced Options icon


Attached Thumbnails
64 bit Windows only recognising 4GB of RAM.-maximum_memory.jpg  
My System SpecsSystem Spec
05 Mar 2011   #5
TypeS

Windows 7 Professional 64-bit
 
 

Quote   Quote: Originally Posted by Floydian42 View Post
I see, so the reason I am not seeing the x64 program files, is because I have no 64 bit programs installed?. That make sense. But what about the 4GB of ram limit?

And its a desktop
C:\Program Files\ is your 64-bit (x64) program file folder. The other one is labeled (x86) to distinguish itself as the 32-bit folder for installation.
My System SpecsSystem Spec
05 Mar 2011   #6
Floydian42

Windows 7 Home Premium 64bit
 
 

I have a PCI Express Sapphire Radeon HD5770 installed. And maximum memory is set to Zero. Could the problem be something to do with a bit of a mix and match of RAM? I have
2 * 1GB DDR2 @ 133MHz ( running duel channel I think ) ( I have had these for ages )
1 * 1GB DDR2 @ 200MHz and
1 * 2GB DDR2 @ 200MHz

Mobo is a Asus P5 B Deluxe if that helps any.
My System SpecsSystem Spec
05 Mar 2011   #7
DocBrown

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

Possible the mis-matched memory Best to have all same Brand & Speed

Also there is a setting in the Bios setup for Memory Re-Mapping that should be checked.


Attached Images
64 bit Windows only recognising 4GB of RAM.-memory_remap_bios.png 
My System SpecsSystem Spec
06 Mar 2011   #8
Floydian42

Windows 7 Home Premium 64bit
 
 

Your a legend.

That fixed the problem.

Thanks for your help Doc.
My System SpecsSystem Spec
06 Mar 2011   #9
DocBrown

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

Your Welcome Floydian42

Check out the SF Tutorials section, I think we have the best info on the internet about win7
My System SpecsSystem Spec
06 Mar 2011   #10
Sp3c5

7 Ultimate 64Bit
 
 

Quote   Quote: Originally Posted by Floydian42 View Post
I have a PCI Express Sapphire Radeon HD5770 installed. And maximum memory is set to Zero. Could the problem be something to do with a bit of a mix and match of RAM? I have
2 * 1GB DDR2 @ 133MHz ( running duel channel I think ) ( I have had these for ages )
1 * 1GB DDR2 @ 200MHz and
1 * 2GB DDR2 @ 200MHz

Mobo is a Asus P5 B Deluxe if that helps any.
I would suggest changing your RAM as what looks like to be a huge bottleneck. To be honest, I can't see how those are DDR2 speeds. To make matters worst, RAM can't run at different speeds. It has to take the lowest. If I may suggest to you some OCZ Reaper HPC RAM. Back in the days, when on special, you could get 4GB of 1066Mhz seed for roughly 50$ with shipping. You would want to check with your motherboard for compatibility. My motherboard is an Asus P5KC. IIRC, we should have the same NB chip and there should not be a problem. Hell, I'm running 6Gb of this stuff at 1120MHz at this very moment. 6.9 in Windows Performance Index for RAM if you are curious
My System SpecsSystem Spec
Reply

 64 bit Windows only recognising 4GB of RAM.




Thread Tools




Similar help and support threads
Thread Forum
Windows 7 isn't recognising ANY drivers
Hey, So today I turned on my laptop. Internet wasn't working, and it said that it couldn't find any networks nearby. I run the troubleshooter and it said that some of my drivers needed updating. I Win+R and typed in "Devmgmt.msc", and it showed up a whole lot of network drivers, sound drivers,...
Drivers
Windows 7 Not Recognising Headphones after reboot
Hello i have build a new pc about 2 months ago and i have a problem with my Audio Codecs so i have asked on a different forum and i will just Write the entire thread here so then later you don't ask the same questions. Please i really need help with this. Hello so i have a problem since i...
Sound & Audio
windows 7 64bit only recognising 2 of my 6gb RAM
ok so i thought i could improve my speed by messing around with the ram settings after going into advanced performance options and virtual memory i messed around a bit and changed some settings and after reboot it said i only had 2gigs and it also says it in the BIOS please help :cry: and its my...
Hardware & Devices
Windows 7 dvd not recognising HDD
Hi guys......I am having a serious problem with my Sony Vaio E series laptop. All of a sudden when I was skyping with my friend, it hung up. So I forced shutdown. Then it could not load windows 7 and asked for start repair. Tried to do that but after hours of repair it said 'Operating System not...
BSOD Help and Support
Windows 7 Not Recognising Canon PowerShot SD750
I tried to connect my Canon PowerShot SD750 to my machine earlier today in order to transfer some photographs, only to find out that my machine is no longer recognising the camera. It is not showing up under "Devices with Removable Storage" under "Computer," nor does CameraWindow recognise that...
Hardware & Devices
windows 7 not recognising keyboard
As.hi to all I purchase a asrock ion 330ht with windows 7 and It did not come with keyboard and mouse. I am trying to use my remote keyboard which I use to use for my vaio xp media edition.When I plug the ir receiver in USB port it says installing driver and successfully installed but when I try...
Hardware & Devices


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 16:50.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App