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Ram problem I have a Emachine pc running Vista with 512 Ram but my computer says i only have 502 ram

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The fact that 512 MB of RAM is decreased to 502 should not result in any performance problems, as this is a minimal difference. You could have faulty RAM, which would result in the 10MB not being visible to, or useable by, the system. Also, the various pieces of hardware within your machine use assigned memory addresses. If the system needs additional space for those addresses, it takes it from RAM. I suggest running a memory check and a hard disk check to make sure all is clean. If you have a performance problem, we should take a look at the running processes.

According to MS at http://support.microsoft.com/kb/946003 :
Before the installation of Windows Vista SP1, Windows Vista displayed how much system memory was available to the operating system. For computers that have 3 GB or less of physical memory installed, the reported memory value can sometimes be somewhat less than the memory physically that is installed. These differences are because of the BIOS and possibly driver reservations of physical memory. For example, some BIOS implementations allocate some physical memory for the graphics adapter. Typical sizes are from 8 MB to 128 MB for graphics. Other sizes are possible. The BIOS and some drivers may reserve physical memory for other peripherals or purposes. These reservations are reasonable and are part of the usual operation for a computer. However, they do reduce how much physical memory is available for use by the operating system and applications.

Posted on Apr 20, 2008

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IT IS A SHARED MEMORY
You won't like the resolution if you remove the 8mb buffer in bios set-up, trust me.(it will make your display look like 16color windows 3.1 or worse) You could try it and it will get you back that 8 meg the other is shadow ram, don't mess with that either.
Your options in advanced video are 8mb and 1mb. My advice, leave it.

Posted on Apr 20, 2008

  • Mark Williams
    Mark Williams Apr 20, 2008

    The reason I know this is I have an EMachines with 768mb Ram
    what windows recognizes is 758, I went into bios setup advance chipset changed video buffer to 1 MB and sved and exited. went into windows and the ram was increased but video resolution sucked.

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mewms_14904
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SOURCE: Ram

the other Ram is shared video
Shared video uses ram from your installed ram chips to use for your on board video adapter.

Posted on Apr 19, 2008

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Posted on Jan 02, 2017

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