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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...?

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migrated from Oct 24 '10 at 17:59

This question came from our site for professional and enthusiast programmers.

marked as duplicate by nhinkle, BinaryMisfit Oct 24 '10 at 18:41

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Identical to almost every "I installed more than 4 gig but see less" question, take your pick:… , ,… – Mokubai Oct 24 '10 at 18:11
As Mokubai mentioned, this question is a dupe of at least 4 previous questions regarding RAM limits on 32-bit operating systems. – nhinkle Oct 24 '10 at 18:38
As this has been answered identically so many times, I'll not add another answer, but here is the Microsoft link that shows the memory limits: – MaQleod Oct 24 '10 at 18:39

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

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

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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.

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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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