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Thread: Will 4Gig Ram Work?

  1. #1
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    Will 4Gig Ram Work?

    Hi, my friend has juts bought himself a 4 gig ram stick 2x4 gig!

    WOuld it work with these specs?

    Code:
    --------[ AIDA32 (c) 1995-2003 Tamas Miklos ]---------------------------------------------------------------------------
    
        Version                                           AIDA32 v3.75
        Author                                            tamas.miklos@aida32.hu
        Homepage                                          http://www.aida32.hu
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        Computer                                          *******Remvoed******
        Generator                                         ****REMOVED*****
        Operating System                                  Microsoft Windows XP Professional 5.1.2600 (WinXP Retail)
        Date                                              2008-01-07
        Time                                              19:11
    
    
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    ************REMOVED********************
    The names of actual companies and products mentioned herein may be the trademarks of their respective owners.
    Thanks for any help

    Also would a 8 gig work??? Thanks

  2. #2
    Get in the van. Fraz's Avatar
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    Re: Will 4Gig Ram Work?

    You're limited to 4 Gigs of address space with XP. You might get close to 4 Gigs of system memory with a graphics card that has little RAM, but you'll never reach it.

    8 Gigs will definitely be utterly pointless with XP.

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    Re: Will 4Gig Ram Work?

    1. Is it DDR or DDR2 4GB stick as the MB you've got here can support only DDR and probably up to 2GB - you'll need to provide MB model or check in specs.
    2. Any 32bit OS can address up to 4GB RAM and Windows 32 bit can assign up to 2GB per application so anything over 4GB Windows will not see (usually on new systems with dynamic access to RAM by Graphic cards Windows will see only 3GB). So to use 4 or 8GB you need 64 bit OS.

  4. #4
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    Re: Will 4Gig Ram Work?

    a word on language here.

    32-bit windows has 4GiB of ADDRESS SPACE. that means it can see 4GiB of memory plus memory mapped devices. Almost all hardware devices, e.g. graphics cards, are "memory mapped" so applications can write into a section of "memory" which actually corresponds to memory on the graphics card (not real physical memory on the system). so 4GiB of address space typically means up to about 3.3GiB of real RAM, the rest used up for memory mapped devices. you need 64-bit windows on a 64-bit CPU to access the rest.

    there's also a limit of 2GiB of memory for a single 32-bit app on Windows - this limit applies to all 32-bit apps, even on a 64-bit OS
    Last edited by directhex; 09-01-2008 at 12:13 PM.

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    Re: Will 4Gig Ram Work?

    directhex wrote:

    there's also a limit of 2GiB of memory for a single 32-bit app on Windows - this limit applies to all apps, even on a 64-bit OS
    I'm affraid it's not true, if the process is compiled in 64bit then 64bit Windows can use up to 8 TB of address space for each process.
    Anyway if you want to use over 3GB of RAM you need 64 bit OS.

  6. #6
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    Re: Will 4Gig Ram Work?

    Quote Originally Posted by Aisalem View Post
    directhex wrote:



    I'm affraid it's not true, if the process is compiled in 64bit then 64bit Windows can use up to 8 TB of address space for each process.
    Anyway if you want to use over 3GB of RAM you need 64 bit OS.
    sorry, i merant it was a limit on 32-bit apps. i'll change it

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    Re: Will 4Gig Ram Work?

    Sorry directhex, if you talking about 32 bit applications then yes inboth 32 & 64 bits they can use up to 2GB (3Gb with some changes to the system)

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    Post Re: Will 4Gig Ram Work?

    Quote Originally Posted by Aisalem View Post
    if the process is compiled in 64bit then 64bit Windows can use up to 8 TB of address space for each process.
    Anyway if you want to use over 3GB of RAM you need 64 bit OS.
    I've got Vista64, and bought 4gb for Crysis. 4gb definitely seemed to "speed things up". I know background processes have more wriggle-room with more memory, but I think Crysis would have been using up more than 2gb on its own.
    However, having said that, both the 32bit and 64bit felt like they were faster. 64bit was smoothest, if I recall.

    I've just flipped up Task Manager (which I have as a startup item, btw; bit geeky) and it says I'm using 1.47gb (out of 4gb). My "active" programs are WMPlayer playing a 16-song album in task-bar mode, Firefox with 20 open tabs (that's right I'm spamming Hexus again (6 tabs)) and Task Manager itself, which I bought up from the Notification area for this reply.
    In similar scenarios, when using 2gb of ram, my computer was on 1.13gb of ram usage.

    So, for me, RAM usage has gone down from 57% to 38% (0dp). With more RAM available, I've read, Vista keeps more in (super) pre-fetch. Even with 2gb, everything opened and ran as quick as I wanted - except for certain games, of course.

    One other thing: With RAM the (low) price it is, why doesn't your friend just get the ram, anyway? It certainly won't hurt...

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  9. #9
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    Re: Will 4Gig Ram Work?

    in a word, no. the 865 chipset only supports upto 4gig of ram if i recall correctly
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