total memory available is only 3.3GB with 4GB physical memory under windows 7 64 bit - memory.JPG (0/1)
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From: someone on 11 Jan 2010 23:00 See attached for phyical and available memory as reported by Win7. Thanks. On Tue, 1 Dec 2009 08:57:48 -0500, "wayneP" <meatprivacydotnet> wrote: >I'm running Vista x64 Ultimate and under System Tools there is a System Info >option. This isn't something I look at regularly but I did check it just >after I rebuilt this machine with a tri-core Phenom II and installed x64. > >In there it shows Total Physical Memory and Available Physical Memory. This >is where I saw 2.52 GB available memory (not 2,52 installed) before posting >yesterday. This number changes and this AM it is showing 3.00 GB. The fact >that it changes led me to believe that the number has something to do with >what is running on the machine at the given time. > >Wayne > >"John John - MVP" <audetweld(a)nbnot.nb.ca> wrote in message >news:#HyouEgcKHA.4724(a)TK2MSFTNGP05.phx.gbl... >> If you have 4GB installed and if the onboard video is using 256MB then the >> remaining 3.75GB should be available to your x64 operating system. Where >> do you see that only 2.52GB is installed? I don't know what you are >> running on your computer but unless you are running very hungry >> applications I have a hard time believing that your processes are using >> 1.25GB of RAM! >> >> This (lost RAM) is an addressing issue only, the hardware doesn't use the >> lost RAM nor does the operating system. The hardware reserves addresses >> at the top of the memory range just under the 4GB barrier so that it can >> communicate directly with the processor, in turn the reserved addresses >> are not available for the installed RAM so you cannot see or use all the >> RAM (on 32-bit Windows), the RAM is without addresses so it goes unused. >> The way around the problem is to remap the RAM without addresses above the >> 4GB barrier and to use a 64-bit or PAE capable operating system to access >> the memory above the 4GB barrier. >> >> John >> >> wayneP wrote: >>> I thought recent mobos did memory remapping by default. I know there is >>> no option in the BIOS of my A780GM-A Ultra to remap memory. With my >>> recently installed Vista 64, there is an indication that there is 3.75 GB >>> of memory (2x2 GB sticks) installed and 2.52 is available. The onboard >>> video is using 256 MB and I assume other system devices and/or processes >>> account for the remainder of the difference between 3.75 and 2.52. >>> >>> Wayne >>> >>> "John John - MVP" <audetweld(a)nbnot.nb.ca> wrote in message >>> news:#bmjJ#dcKHA.5472(a)TK2MSFTNGP02.phx.gbl... >>>> Like others said, the OP most likely needs to remap memory above the 4GB >>>> barrier (in the BIOS). >>>> >>>> John >>>> >>>> wayneP wrote: >>>>> The original post is confusing. 64 bit isn't a regular upgrade from 32 >>>>> bit. It would require a custom or clean install. It appears that the OP >>>>> might have just upgraded 32 bit Vista to 32 bit Windows 7 and thus the >>>>> same amount of ram is being reported. >>>>> >>>>> Wayne >>>>> >>>>> "Jeff Gaines" <jgaines_newsid(a)yahoo.co.uk> wrote in message >>>>> news:xn0gi8ml3231b2p006(a)msnews.microsoft.com... >>>>>> On 29/11/2009 in message <ijq5h5lbomqkm9qb9mv97h2qt20ndmio41(a)4ax.com> >>>>>> Ken Blake, MVP wrote: >>>>>> >>>>>>> 1. All 32-bit client versions of Windows (not just Vista/XP/7) have a >>>>>>> 4GB address space (64-bit versions can use much more). That's the >>>>>>> theoretical upper limit beyond which you can not go. >>>>>> >>>>>> The OP said he had installed Win7-64 though. >>>>>> >>>>>> -- >>>>>> Jeff Gaines Dorset UK >>>>>> The facts, although interesting, are irrelevant >>>>> |