Go Back  DVD Talk Forum > General Discussions > Tech Talk
Reload this Page >

Vista only showing 2 gb memory when 4 available

Tech Talk Discuss PC Hardware, Software, Internet and Other Technology

Vista only showing 2 gb memory when 4 available

Old 02-17-07, 12:44 PM
  #1  
DVD Talk Limited Edition
Thread Starter
 
Join Date: Nov 1999
Location: In the ATL
Posts: 6,739
Likes: 0
Received 0 Likes on 0 Posts
Vista only showing 2 gb memory when 4 available

Finally got Vista going here with the help of you guys, thanks!

So I have 4 gb memory in my box and vista shows 2 gb only. BIOS shows 4 GB as expected. Did some googling and because of the max 4 gb address space, some memory will be eaten up to address videocard etc.

However my videocard has 256 mg or 512 (dont remember offhand), so I'd hope to get at least 3 og 3.25 gb free ?

I know a lot of people have these issues - would very much appreciate a heads up if you have an idea on how to get more free.

ps - vista is a memory hog when you run aero (which is soooo slick) - uses about 1.5gb at boot with no apps running here!
Old 02-17-07, 04:44 PM
  #2  
Guest
 
Join Date: Apr 2004
Location: Pittsburgh, PA, USA
Posts: 2,239
Likes: 0
Received 0 Likes on 0 Posts
Are you working with integrated graphics, or a separate graphics card?

Vista with Aero alone uses 1.5 GB of memory??? OMFG.

I did apply for my free Vista "upgrade," although from what I've read I may not be getting it for several weeks. Not like I plan to do anything with it. Originally I fully intended to install it. Now I seriously doubt it.
Old 02-17-07, 05:12 PM
  #3  
DVD Talk Legend
 
sracer's Avatar
 
Join Date: Feb 2000
Location: Prescott Valley, AZ
Posts: 14,713
Received 26 Likes on 18 Posts
Originally Posted by Altimus Prime
Are you working with integrated graphics, or a separate graphics card?

Vista with Aero alone uses 1.5 GB of memory??? OMFG.

I did apply for my free Vista "upgrade," although from what I've read I may not be getting it for several weeks. Not like I plan to do anything with it. Originally I fully intended to install it. Now I seriously doubt it.
I sent in for my free Vista upgrade but have absolutely no intention on installing it. My system (HP Pavilion dv9009 notebook) is very speedy running Windows Media Center Edition 2005 and I don't want it slowed down just for some eye candy.
Old 02-17-07, 07:29 PM
  #4  
DVD Talk Legend
 
McHawkson's Avatar
 
Join Date: Jan 2000
Location: America Empire
Posts: 14,752
Likes: 0
Received 1 Like on 1 Post
You know you can disable Aero program, right?
Old 02-17-07, 07:50 PM
  #5  
DVD Talk Legend
 
Join Date: Jan 2000
Posts: 16,171
Likes: 0
Received 1 Like on 1 Post
Here is some general information

http://msdn2.microsoft.com/en-gb/library/aa366778.aspx

Here is some more specific information

http://support.microsoft.com/kb/929580/en-us


It depends on your actual machine what you will really end up being able to 'see'

If you are using a 32 bit version of Vista, this is normal
Old 02-18-07, 12:18 AM
  #6  
DVD Talk Godfather
 
fumanstan's Avatar
 
Join Date: Oct 2002
Location: Irvine, CA
Posts: 55,349
Received 20 Likes on 8 Posts
Hmm... I've never seen 4 GB only reported as 2 GB. Typically I only see it cut down to 3.5 GB because of 32 bit limitations. I'm not so sure that's all that's going on...
Old 02-18-07, 12:31 AM
  #7  
DVD Talk Legend
 
Shazam's Avatar
 
Join Date: Jul 1999
Location: Canuckistan
Posts: 10,027
Likes: 0
Received 0 Likes on 0 Posts
Read this, and learn why Vista seems to use so much memory:

http://www.codinghorror.com/blog/archives/000688.html
Old 02-18-07, 03:33 PM
  #8  
DVD Talk Limited Edition
Thread Starter
 
Join Date: Nov 1999
Location: In the ATL
Posts: 6,739
Likes: 0
Received 0 Likes on 0 Posts
Its a 'real' graphics card, nvidia something - not integrated. I know i'll lose some for adressing, but 2 gb seems like a lot - i really want to get at leaast 3 gb?
Old 02-18-07, 03:38 PM
  #9  
DVD Talk Limited Edition
Thread Starter
 
Join Date: Nov 1999
Location: In the ATL
Posts: 6,739
Likes: 0
Received 0 Likes on 0 Posts
Seems enabling PAE mode is the way to go? This is a BIOS thing I assume?
Old 02-18-07, 04:34 PM
  #10  
Senior Member
 
Join Date: Apr 2002
Posts: 628
Likes: 0
Received 0 Likes on 0 Posts
PAE mode is the most likely thing to fix the problem.

If PAE mode makes all 4GB accessible to Windows, then the reason isn't related to the BIOS. It has to do with the way PCs address memory, and is fairly technical. If you're really curious, there's a decent short explanation here.
Old 02-18-07, 08:38 PM
  #11  
DVD Talk Gold Edition
 
dgmayor's Avatar
 
Join Date: May 2001
Location: Holly Springs, NC
Posts: 2,036
Likes: 0
Received 1 Like on 1 Post
I'm running XP 64 bit with 4 gb of ram, PAE enabled and still only get 3.5gb.
Old 02-19-07, 02:13 AM
  #12  
DVD Talk Limited Edition
Thread Starter
 
Join Date: Nov 1999
Location: In the ATL
Posts: 6,739
Likes: 0
Received 0 Likes on 0 Posts
Is there an easy to use guide to enable PAE?

I tried using bdcedit /set pae ForceEnable but that made absolutely no difference.
Old 02-19-07, 02:41 AM
  #13  
DVD Talk God
 
kvrdave's Avatar
 
Join Date: Aug 1999
Location: Pacific NW
Posts: 86,189
Likes: 0
Received 3 Likes on 3 Posts
Help me out, dudes. Aero? PAE?

I'm running vista with 3 gb RAM, but so far it basically looks like XP with a little different look. Where do I find out all the stuff this should be able to do?
Old 02-19-07, 04:02 AM
  #14  
DVD Talk Limited Edition
Thread Starter
 
Join Date: Nov 1999
Location: In the ATL
Posts: 6,739
Likes: 0
Received 0 Likes on 0 Posts
A bit more research later.. seems there is a 3gb switch that can be enabled :

http://www.formz.com/forum2/messages...4987#POST54850

To "select the 3 Gig Switch for Vista," select Start / All Programs / Run and enter:

BCDEdit /Set IncreaseUserVa 3072

and press Enter. (Note that the last number can be any number between 2048 and 3072 inclusive, to specify any value between 2 and 3 gigs).

If you want confirmation that this has been enabled, you can select

Start / Run / cmd

and then enter the same string as noted above in blue. In either case, reboot when complete so that the changes will take effect.


havent tried it yet.

kvrdave - aero = the slick usergui on vista. PAE = physical address extension - some hack workaround (well..) to the limits of 4 gb adressing imposed by 32 bit operating systems. 640kb is enough for anyone...
Old 02-19-07, 06:34 AM
  #15  
DVD Talk Hero
 
Join Date: Aug 2001
Location: in da cloud
Posts: 26,193
Likes: 0
Received 1 Like on 1 Post
Originally Posted by ravan
Seems enabling PAE mode is the way to go? This is a BIOS thing I assume?

it's a 32 bit limitation

i forgot the math, but a 32 bit CPU can only address 2GB RAM max. PAE and everything else Intel and MS did were just hacks. if you want true >2GB support you need to buy a 64 bit CPU

and yes, Vista is a RAM hog with Aero and everything else turned on
Old 02-19-07, 10:08 AM
  #16  
Senior Member
 
Join Date: Apr 2002
Posts: 628
Likes: 0
Received 0 Likes on 0 Posts
Argh.

There's two separate limitations that people get confused about. The first is that 32-bit OSes can handle up to 4GB of physical RAM without extra hardware support, and that hardware is allowed to reserve part of that 4GB space for its own use. PAE mode (which is certainly not a hack!) uses extra hardware present on all modern Intel and AMD CPUs to let OSes access up to 64GB of physical RAM in 32-bit mode. It can also work around the problem of hardware eating up part of the 4GB memory space. (Note that even though PAE adds support for up to 64GB of physical RAM, the consumer versions of 32-bit Windows still have an artificial 4GB limit.)

The second limit is that each individual Windows program is normally allowed to use up to 2GB of your physical RAM. (The reason for the restriction is similar but not identical.) The 3GB switch bumps that limit up to 3GB. It does not help if your problem is that Windows doesn't see all of your RAM; it's only useful if you have one really memory-hungry program that needs more than 2GB of RAM all for itself.
Old 02-19-07, 12:58 PM
  #17  
DVD Talk Godfather
 
fumanstan's Avatar
 
Join Date: Oct 2002
Location: Irvine, CA
Posts: 55,349
Received 20 Likes on 8 Posts
I still say none of the known limitations would result in Windows displaying 4 GB of RAM as only 2 GB.
Old 02-24-07, 03:09 AM
  #18  
DVD Talk Limited Edition
Thread Starter
 
Join Date: Nov 1999
Location: In the ATL
Posts: 6,739
Likes: 0
Received 0 Likes on 0 Posts
unfrtunately that is exactly what happens w/ me.. i have 4 gb, but windows show 2
Old 02-24-07, 10:12 AM
  #19  
DVD Talk Hall of Fame
 
Join Date: Apr 2002
Location: Philadelphia
Posts: 8,572
Likes: 0
Received 1 Like on 1 Post
32bit Vista will not "see" anymore than 2gb of RAM. You need 64bit Vista to "see" more than that.
Old 02-24-07, 11:38 AM
  #20  
DVD Talk Gold Edition
 
Join Date: May 2002
Location: waiting for forum.dvdtalk.com ...
Posts: 2,755
Likes: 0
Received 1 Like on 1 Post
Originally Posted by ravan
640kb is enough for anyone...
hey, this is not /. ...
Old 02-28-07, 06:26 AM
  #21  
Member
 
Join Date: Dec 1999
Location: TX
Posts: 245
Likes: 0
Received 0 Likes on 0 Posts
With Vista 32bit you should be registering 3.5 GB of RAM.

Maybe some more details would help... what brand motherboard are you using and have you updated to the latest BIOS for the board? Did you run XP previously and did it see 3.5 GB?

Here are some suggestions that come to mind:

You might try switching the memory chips around. I am assuming you have DDR RAM so make sure the pairings are identical chips.

Next question I would have is if you are overclocking or have changed any Advanced BIOS settings. Maybe a CMOS reset to defaults would correct the problem.

If you hold down Ctrl-Shift and press ESC the Task Manager will come up. Click on the Performance Tab. Under the Physical Memory what does it say next to Total?

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.