Windows XP Professional x64 Only Seeing 3GB RAM?
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From: Charlie Russel - MVP on 17 Dec 2007 18:50 I assume so. I don't run dual video cards. Makes no sense for what I do. -- Charlie. http://msmvps.com/xperts64 http://mvp.support.microsoft.com/profile/charlie.russel "Colin Barnhorst" <colinbarharst(a)msn.com> wrote in message news:B4813107-DE11-4634-80AB-54A83622E356(a)microsoft.com... > Yes, most of the folks with shockingly low numbers have SLI boards (I > presume Crossfire does the same). > > "Charlie Russel - MVP" <charlie(a)mvKILLALLSPAMMERSps.org> wrote in message > news:E1886837-AFFB-47EF-B141-1760745EEE2A(a)microsoft.com... >> Yes, I've seen this as low as 2.7 GB and as high as 3.5 GB. Depends on >> the hardware devices. Try putting in two 512 Mb Video cards and watch >> your RAM disappear. :( >> >> -- >> Charlie. >> http://msmvps.com/xperts64 >> http://mvp.support.microsoft.com/profile/charlie.russel >> >> >> "Colin Barnhorst" <colinbarharst(a)msn.com> wrote in message >> news:5AC1BDE8-0655-47B5-98E2-E54E97E5BD9A(a)microsoft.com... >>> btw, the 3.12GB given in the article is not a fixed number. Notice that >>> it is only given as an example to illustrate the symptom: "For example, >>> the System Information dialog box may report 3,120 megabytes (MB) of >>> system memory on a computer that has 4 GB of memory installed." In >>> theory Windows can span 4GB's of addresses. It is the conflicting >>> needs of the OS and the hardware devices, plus the way Windows reports >>> memory, that results in all the confusion. >>> >>> <miso(a)sushi.com> wrote in message >>> news:952929db-ad85-498b-b786-54b9f5db92d1(a)s12g2000prg.googlegroups.com... >>>> On Dec 15, 2:57 pm, "Colin Barnhorst" <colinbarha...(a)msn.com> wrote: >>>>> It's not BS. I have a box with a mobo that refuses to support 4GB ram >>>>> under >>>>> Windows x64. It does support 4GB under 32-bit Windows but not 64-bit. >>>>> It >>>>> does happen. It is a design flaw and would take a different mobo to >>>>> fix. >>>>> >>>>> "Dan" <Danodem...(a)gmail.com> wrote in message >>>>> >>>>> news:d0136760-5499-44ce-92cb-c57ab77ed669(a)b1g2000pra.googlegroups.com... >>>>> >>>>> > On Dec 15, 12:58 pm, "Colin Barnhorst" <colinbarha...(a)msn.com> >>>>> > wrote: >>>>> >> What did HP tell you when you asked a support person? >>>>> >>>>> >> "Dan" <Danodem...(a)gmail.com> wrote in message >>>>> >>>>> >>news:7a663206-fca0-48e0-9240-d0c53ed79f66(a)w56g2000hsf.googlegroups.com... >>>>> >>>>> >> > On Dec 14, 5:16 pm, Dan <Danodem...(a)gmail.com> wrote: >>>>> >> >> On Dec 14, 4:35 pm, m...(a)sushi.com wrote: >>>>> >>>>> >> >> > On Dec 14, 4:42 am, Dan <Danodem...(a)gmail.com> wrote: >>>>> >>>>> >> >> > > Windows XP Professional x64 and 4GB RAM? >>>>> >> >> > > Alright, So with all the development and what not that I do, >>>>> >> >> > > I >>>>> >> >> > > decided >>>>> >> >> > > to upgrade my system to 4GB of RAM. Also, due to software >>>>> >> >> > > incompatibilities with Vista, I decided the my only real >>>>> >> >> > > choice >>>>> >> >> > > was >>>>> >> >> > > Windows XP Professional x64 for my OS. I ran through the >>>>> >> >> > > entire >>>>> >> >> > > install, got all my drivers, everything seemed to be going >>>>> >> >> > > well. I >>>>> >> >> > > got >>>>> >> >> > > my RAM today in the mail, slapped it in, checked the BIOS, >>>>> >> >> > > and >>>>> >> >> > > everything looked good. However, once I got into Windows, it >>>>> >> >> > > only >>>>> >> >> > > shows that I have 3GB >>>>> >> >> > > available:http://i60.photobucket.com/albums/h33/danodemano/Spec.jpg >>>>> >>>>> >> >> > > I checked with CPUZ to make sure that it was seeing the full >>>>> >> >> > > 4GB >>>>> >> >> > > and >>>>> >> >> > > it >>>>> >> >> > > was:http://i60.photobucket.com/albums/h33/danodemano/CPUZ_RAM.jpg >>>>> >>>>> >> >> > > Now correct me if I'm wrong, but I had always thought that >>>>> >> >> > > XP >>>>> >> >> > > 64-bit >>>>> >> >> > > supported something like 128GB of RAM....so why is my system >>>>> >> >> > > not >>>>> >> >> > > seeing the full 4GB???? Is there some option that I have to >>>>> >> >> > > enable >>>>> >> >> > > to >>>>> >> >> > > allow Windows to use the full 4GB??? >>>>> >>>>> >> >> > > Any help would be appreciated, thanks!! >>>>> >>>>> >> >> > On my mobo, you need to get into the bios, enter control+F1, >>>>> >> >> > which >>>>> >> >> > adds more features to tweak. Then find "memory remap." >>>>> >>>>> >> >> Interesting....I will try that and let you know how it turns >>>>> >> >> out. I >>>>> >> >> have an HP laptop though so I don't know how much I can do with >>>>> >> >> the >>>>> >> >> BIOS. >>>>> >> >> This is my motherboard info if that >>>>> >> >> helps:http://i60.photobucket.com/albums/h33/danodemano/Motherboard.jpg >>>>> >>>>> >> > No luck.....I can't seem to get into any of the hidded options of >>>>> >> > the >>>>> >> > BIOS. It's propably something that HP has done to keep me from >>>>> >> > doing >>>>> >> > it, I'm sure..... >>>>> >> > Grrr....guess I'm just out of luck at this point, unless someones >>>>> >> > has >>>>> >> > any ideas??? >>>>> >>>>> > They said that it doesn't support 4GB of RAM and that there was >>>>> > nothing that they could do....the typical BS answer I'm sure. >>>> >>>> I thought the 32 bit MS OS couldn't span the full 32 bits, but about >>>> 3.2G. >>>> >>>> Here is a microsoft link indicating 32 bit windows is limited to 3.12G >>>> http://support.microsoft.com/kb/929605/en-us >>> >> >
From: Chuck Walbourn [MSFT] on 17 Dec 2007 19:58 Assuming you are using a newer BIOS, the 'less than 4 GB RAM' problem should only happen with 32-bit OSes not 64-bit ones. Sounds like you need to update your BIOS... Adapter cards (like plug-in video cards) steal from the 'upper 1 GB' of the 4 GB memory space of standard 32-bit memory systems. The more and larger your cards, the less memory your 32-bit OS will see. Again, x64 OSes shouldn't have this problem with a properly working BIOS. -- Chuck Walbourn SDE, XNA Developer Connection This posting is provided "AS IS" with no warranties, and confers no rights.
From: Colin Barnhorst on 17 Dec 2007 20:30 The OP does need to update his bios. "Chuck Walbourn [MSFT]" <chuckw(a)online.microsoft.com> wrote in message news:OuHfHERQIHA.5988(a)TK2MSFTNGP02.phx.gbl... > Assuming you are using a newer BIOS, the 'less than 4 GB RAM' problem > should only happen with 32-bit OSes not 64-bit ones. Sounds like you need > to update your BIOS... > > Adapter cards (like plug-in video cards) steal from the 'upper 1 GB' of > the 4 GB memory space of standard 32-bit memory systems. The more and > larger your cards, the less memory your 32-bit OS will see. Again, x64 > OSes shouldn't have this problem with a properly working BIOS. > > -- > Chuck Walbourn > SDE, XNA Developer Connection > > This posting is provided "AS IS" with no warranties, and confers no > rights. >
From: Charlie Russel - MVP on 17 Dec 2007 20:34 Yes, we were talking (way up the thread somewhere) about a system that didn't have the BIOS re-mapping going on. On my systems, I only run 64-bit. Full stop. -- Charlie. http://msmvps.com/xperts64 http://mvp.support.microsoft.com/profile/charlie.russel "Chuck Walbourn [MSFT]" <chuckw(a)online.microsoft.com> wrote in message news:OuHfHERQIHA.5988(a)TK2MSFTNGP02.phx.gbl... > Assuming you are using a newer BIOS, the 'less than 4 GB RAM' problem > should only happen with 32-bit OSes not 64-bit ones. Sounds like you need > to update your BIOS... > > Adapter cards (like plug-in video cards) steal from the 'upper 1 GB' of > the 4 GB memory space of standard 32-bit memory systems. The more and > larger your cards, the less memory your 32-bit OS will see. Again, x64 > OSes shouldn't have this problem with a properly working BIOS. > > -- > Chuck Walbourn > SDE, XNA Developer Connection > > This posting is provided "AS IS" with no warranties, and confers no > rights. >
From: miso on 17 Dec 2007 22:33
On Dec 17, 5:34 pm, "Charlie Russel - MVP" <char...(a)mvKILLALLSPAMMERSps.org> wrote: > Yes, we were talking (way up the thread somewhere) about a system that > didn't have the BIOS re-mapping going on. On my systems, I only run 64-bit. > Full stop. > > -- > Charlie.http://msmvps.com/xperts64http://mvp.support.microsoft.com/profile/charlie.russel > > "Chuck Walbourn [MSFT]" <chu...(a)online.microsoft.com> wrote in messagenews:OuHfHERQIHA.5988(a)TK2MSFTNGP02.phx.gbl... > > > Assuming you are using a newer BIOS, the 'less than 4 GB RAM' problem > > should only happen with 32-bit OSes not 64-bit ones. Sounds like you need > > to update your BIOS... > > > Adapter cards (like plug-in video cards) steal from the 'upper 1 GB' of > > the 4 GB memory space of standard 32-bit memory systems. The more and > > larger your cards, the less memory your 32-bit OS will see. Again, x64 > > OSes shouldn't have this problem with a properly working BIOS. > > > -- > > Chuck Walbourn > > SDE, XNA Developer Connection > > > This posting is provided "AS IS" with no warranties, and confers no > > rights. I know you can use the hardware manager to see the memory that each device uses. However, is there a program that does the reverse? That is, show the memory map. |