How much ram can W7 really use?

Discussion in 'alt.windows7.general' started by Jeff@nospam.invalid, Sep 10, 2011.

  1. Guest

    I have an Intel Core Duo CPU (P7450 @ 2.13GHz) computer with 6 GB
    installed RAM running Windows 7 64 bit Home Premium. But I've been told
    that my apps can only use the first 4 GB of RAM.

    Is that true? If so what use are the additional 2 GB RAM?

    Thanks, Jeff
     
    , Sep 10, 2011
    #1
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  2. Yousuf Khan Guest

    On 10/09/2011 6:31 PM, d wrote:
    > I have an Intel Core Duo CPU (P7450 @ 2.13GHz) computer with 6 GB
    > installed RAM running Windows 7 64 bit Home Premium. But I've been told
    > that my apps can only use the first 4 GB of RAM.
    >
    > Is that true? If so what use are the additional 2 GB RAM?


    If your apps are 32-bit apps, running under the 64-bit operating system,
    then yes, they can only use 4GB in total. If they are full 64-bit apps,
    then they can use the entire allotment of RAM that Windows 7 64-bit has
    available to it.

    However, on a related note, not all Windows 7 64-bits are built alike.

    Memory Limits for Windows Releases (Windows)
    http://msdn.microsoft.com/en-us/library/aa366778(VS.85).aspx#physical_memory_limits_windows_7

    Here are the upper RAM limits for the different editions of Windows 7:

    Starter (32-bit only): 4GB
    Home Basic: 8GB
    Home Premium: 16GB
    Professional: 192GB
    Enterprise: 192GB
    Ultimate: 192GB

    Yousuf Khan
     
    Yousuf Khan, Sep 10, 2011
    #2
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  3. Guest

    On 9/10/11 6:43 PM, Yousuf Khan wrote:
    > On 10/09/2011 6:31 PM, d wrote:
    >> I have an Intel Core Duo CPU (P7450 @ 2.13GHz) computer with 6 GB
    >> installed RAM running Windows 7 64 bit Home Premium. But I've been told
    >> that my apps can only use the first 4 GB of RAM.
    >>
    >> Is that true? If so what use are the additional 2 GB RAM?

    >
    > If your apps are 32-bit apps, running under the 64-bit operating system,
    > then yes, they can only use 4GB in total. If they are full 64-bit apps,
    > then they can use the entire allotment of RAM that Windows 7 64-bit has
    > available to it.
    >
    > However, on a related note, not all Windows 7 64-bits are built alike.
    >
    > Memory Limits for Windows Releases (Windows)
    > http://msdn.microsoft.com/en-us/library/aa366778(VS.85).aspx#physical_memory_limits_windows_7
    >
    >
    > Here are the upper RAM limits for the different editions of Windows 7:
    >
    > Starter (32-bit only): 4GB
    > Home Basic: 8GB
    > Home Premium: 16GB
    > Professional: 192GB
    > Enterprise: 192GB
    > Ultimate: 192GB
    >
    > Yousuf Khan

    Thank you. That is very useful.

    I know there are some 64 bit apps, but since most apps that the average
    user uses today are 32 bit, it sounds like anything beyond 4GB is really
    wasted ram.

    Jeff
     
    , Sep 12, 2011
    #3
  4. Paul Guest

    d wrote:
    > On 9/10/11 6:43 PM, Yousuf Khan wrote:
    >> On 10/09/2011 6:31 PM, d wrote:
    >>> I have an Intel Core Duo CPU (P7450 @ 2.13GHz) computer with 6 GB
    >>> installed RAM running Windows 7 64 bit Home Premium. But I've been told
    >>> that my apps can only use the first 4 GB of RAM.
    >>>
    >>> Is that true? If so what use are the additional 2 GB RAM?

    >>
    >> If your apps are 32-bit apps, running under the 64-bit operating system,
    >> then yes, they can only use 4GB in total. If they are full 64-bit apps,
    >> then they can use the entire allotment of RAM that Windows 7 64-bit has
    >> available to it.
    >>
    >> However, on a related note, not all Windows 7 64-bits are built alike.
    >>
    >> Memory Limits for Windows Releases (Windows)
    >> http://msdn.microsoft.com/en-us/library/aa366778(VS.85).aspx#physical_memory_limits_windows_7
    >>
    >>
    >>
    >> Here are the upper RAM limits for the different editions of Windows 7:
    >>
    >> Starter (32-bit only): 4GB
    >> Home Basic: 8GB
    >> Home Premium: 16GB
    >> Professional: 192GB
    >> Enterprise: 192GB
    >> Ultimate: 192GB
    >>
    >> Yousuf Khan

    > Thank you. That is very useful.
    >
    > I know there are some 64 bit apps, but since most apps that the average
    > user uses today are 32 bit, it sounds like anything beyond 4GB is really
    > wasted ram.
    >
    > Jeff
    >


    If you run four 2GB programs, your 8GB is now used up.

    If you use Virtual Machines regularly, the RAM gets used up pretty
    fast. I've had as many as three of them running at the same time,
    and ran out of system ram to do virtually anything else.

    Paul
     
    Paul, Sep 12, 2011
    #4
  5. Guest

    On 9/12/11 5:24 PM, Paul wrote:
    > d wrote:
    >> On 9/10/11 6:43 PM, Yousuf Khan wrote:
    >>> On 10/09/2011 6:31 PM, d wrote:
    >>>> I have an Intel Core Duo CPU (P7450 @ 2.13GHz) computer with 6 GB
    >>>> installed RAM running Windows 7 64 bit Home Premium. But I've been told
    >>>> that my apps can only use the first 4 GB of RAM.
    >>>>
    >>>> Is that true? If so what use are the additional 2 GB RAM?
    >>>
    >>> If your apps are 32-bit apps, running under the 64-bit operating system,
    >>> then yes, they can only use 4GB in total. If they are full 64-bit apps,
    >>> then they can use the entire allotment of RAM that Windows 7 64-bit has
    >>> available to it.
    >>>
    >>> However, on a related note, not all Windows 7 64-bits are built alike.
    >>>
    >>> Memory Limits for Windows Releases (Windows)
    >>> http://msdn.microsoft.com/en-us/library/aa366778(VS.85).aspx#physical_memory_limits_windows_7
    >>>
    >>>
    >>>
    >>> Here are the upper RAM limits for the different editions of Windows 7:
    >>>
    >>> Starter (32-bit only): 4GB
    >>> Home Basic: 8GB
    >>> Home Premium: 16GB
    >>> Professional: 192GB
    >>> Enterprise: 192GB
    >>> Ultimate: 192GB
    >>>
    >>> Yousuf Khan

    >> Thank you. That is very useful.
    >>
    >> I know there are some 64 bit apps, but since most apps that the
    >> average user uses today are 32 bit, it sounds like anything beyond 4GB
    >> is really wasted ram.
    >>
    >> Jeff
    >>

    >
    > If you run four 2GB programs, your 8GB is now used up.
    >
    > If you use Virtual Machines regularly, the RAM gets used up pretty
    > fast. I've had as many as three of them running at the same time,
    > and ran out of system ram to do virtually anything else.
    >
    > Paul

    Aha! I misunderstood. So, because a 32 bit app can only use 4GB another
    running 32 bit app can use a "different" ram because W7 makes it
    available to it. That's cool.

    Jeff
     
    , Sep 12, 2011
    #5
  6. Ivan I. Deer Guest

    One ram is usually able to take care of the needs of about 20 ewes.
     
    Ivan I. Deer, Sep 13, 2011
    #6
  7. Tim Slattery Guest

    "" <> wrote:

    >I have an Intel Core Duo CPU (P7450 @ 2.13GHz) computer with 6 GB
    >installed RAM running Windows 7 64 bit Home Premium. But I've been told
    >that my apps can only use the first 4 GB of RAM.


    The amount of physical RAM that 64bit Win7 can use is extremely high.
    AFAIK, the limitation these days is always in the hardware, not the
    Win7 software. So all of your 6GB is seen and used by 64bit Win7.

    32-bit programs are all assigned a 4GB virtual address space when they
    run. (64-bit programs are assigned a much larger VM space). The OS
    tries to keep as much of all these VM spaces in physical RAM as it
    can. It's an *extremely* complex system involving swapping pages of
    storage between RAM and the swap file on your hard drive. The more
    physical RAM in your machine, the more of the VMs can reside there,
    and the less time your machine will spend swapping pages.

    So *all* of your physical RAM will be used, and having more of it will
    speed up your 32-bit programs, especially if you run many of them
    simultaneously or if you run RAM-hungry apps.

    --
    Tim Slattery

    http://members.cox.net/slatteryt
     
    Tim Slattery, Sep 13, 2011
    #7
  8. "Tim Slattery" <> wrote in message
    news:...
    > "" <> wrote:
    >
    >>I have an Intel Core Duo CPU (P7450 @ 2.13GHz) computer with 6 GB
    >>installed RAM running Windows 7 64 bit Home Premium. But I've been
    >>told
    >>that my apps can only use the first 4 GB of RAM.

    >
    > The amount of physical RAM that 64bit Win7 can use is extremely
    > high.
    > AFAIK, the limitation these days is always in the hardware, not the
    > Win7 software.


    Except when the limitation *is* Win7 - you might take a look at Yousuf
    Khan's reply elsethread which lists the arbitrarily limits MS has
    imposed in various flavors of Win7. I agree, in this case Win7 isn't
    limiting access to the 6GB memory since the OP is using Win7 Home
    Premium, but all the same...

    --
    Zaphod

    "The best Bang since the Big One" - Eccentrica Gallumbits
     
    Zaphod Beeblebrox, Sep 13, 2011
    #8
  9. Tim Slattery Guest

    "Zaphod Beeblebrox" <> wrote:

    >Except when the limitation *is* Win7 - you might take a look at Yousuf
    >Khan's reply elsethread which lists the arbitrarily limits MS has
    >imposed in various flavors of Win7. I agree, in this case Win7 isn't
    >limiting access to the 6GB memory since the OP is using Win7 Home
    >Premium, but all the same...



    Point taken. Win7 64-bit limits:

    Starter: (not available in 64-bit version)
    Home Basic: 8GB
    Home Premium: 16GB
    Professional, Enterprise, Ultimate: 192GB

    Entirely arbitrary as you say, Zaphod.


    (Source:
    http://msdn.microsoft.com/en-us/library/aa366778(v=vs.85).aspx#physical_memory_limits_windows_7
    )

    --
    Tim Slattery

    http://members.cox.net/slatteryt
     
    Tim Slattery, Sep 13, 2011
    #9
  10. charlie Guest

    On 9/13/2011 12:25 PM, Tim Slattery wrote:
    > "Zaphod Beeblebrox"<> wrote:
    >
    >> Except when the limitation *is* Win7 - you might take a look at Yousuf
    >> Khan's reply elsethread which lists the arbitrarily limits MS has
    >> imposed in various flavors of Win7. I agree, in this case Win7 isn't
    >> limiting access to the 6GB memory since the OP is using Win7 Home
    >> Premium, but all the same...

    >
    >
    > Point taken. Win7 64-bit limits:
    >
    > Starter: (not available in 64-bit version)
    > Home Basic: 8GB
    > Home Premium: 16GB
    > Professional, Enterprise, Ultimate: 192GB
    >
    > Entirely arbitrary as you say, Zaphod.
    >
    >
    > (Source:
    > http://msdn.microsoft.com/en-us/library/aa366778(v=vs.85).aspx#physical_memory_limits_windows_7
    > )
    >

    And, possibly, with some effort, the RAM limits (License restriction)
    can be gotten around. The information is generally correct for Vista and
    Win 7.
    http://www.geoffchappell.com/viewer.htm?doc=notes/windows/license/memory.htm
     
    charlie, Sep 13, 2011
    #10
  11. On Tue, 13 Sep 2011 10:20:59 -0400, Zaphod Beeblebrox wrote:

    > elsethread


    Cute...once I figured it out :)

    --
    Gene E. Bloch (Stumbling Bloch)
     
    Gene E. Bloch, Sep 13, 2011
    #11
  12. "Gene E. Bloch" <> wrote in message
    news:...
    > On Tue, 13 Sep 2011 10:20:59 -0400, Zaphod Beeblebrox wrote:
    >
    >> elsethread

    >
    > Cute...once I figured it out :)
    >

    I stumbled across it once and thought it worked, so adopted it. Doubt
    you'll ever see it in Webster's but all the same... ;-)

    --
    Zaphod

    Vell, Zaphod's just zis guy, ya know? - Gag Halfrunt
     
    Zaphod Beeblebrox, Sep 13, 2011
    #12
  13. On Tue, 13 Sep 2011 15:09:14 -0400, Zaphod Beeblebrox wrote:

    > "Gene E. Bloch" <> wrote in message
    > news:...
    >> On Tue, 13 Sep 2011 10:20:59 -0400, Zaphod Beeblebrox wrote:
    >>
    >>> elsethread

    >>
    >> Cute...once I figured it out :)
    >>

    > I stumbled across it once and thought it worked, so adopted it. Doubt
    > you'll ever see it in Webster's but all the same... ;-)


    Well, heck, what does Webster know?

    --
    Gene E. Bloch (Stumbling Bloch)
     
    Gene E. Bloch, Sep 13, 2011
    #13
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