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Windows XP and RAM 3.5GB+

Hi. I've installed 6 Gb of RAM onto my computer running Win7. For some reason most programs (Everest in Memory tab says 3327mb, Task Manager says that too) report that 4 Gb of RAM is installed. I also did Wmi query against Win32_ComputerSystem and the field TotalPhysicalMemory yields 3488931840! However SPD tab in Everest sees both banks of memory and identifies tham correctly:

  • DIMM1: GoodRAM GR1333D364L9/2G

  • DIMM2: Kingston 9905471-009.A00LF

    What the...?


You are running Windows7 32bit version, which lets you use around 4Gb of memory. I suggest upgrading to the 64bit version


Because you've installed a 32-bit version of Windows 7 no doubt.


Because you are running a 32 bit operating system and this is all it can address? Try upgrading to Win7 x64 to enable access to all of the memory.


There are two possible reasons:

  • If you are using a 32 bit version of Windows, the address space is limited to 4 GB and the top half gig is reserved for hardware access.

  • Some older memory controllers doesn't allow use of more than a bit over 3 GB of memory (I had a laptop with that problem).

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