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I found 3 numbers for the Total Physical Memory:

  1. In the Task Manager under the Performance tab: 1978 MB
  2. In Computer Properties: 2 GB
  3. And running wmic computersystem get TotalPhysicalMemory /format:list in the command line: 2074554368 Bites

Number 1 matches Number 3 except Number 1 is rounded. When I convert Number 3 to GB 2074554368 / 1024 / 1024 / 1024 I don't quite get 2 GB. I get 1.93207932 GB.

Why does Number 1 and Number 3 not match Number 2?

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up vote 4 down vote accepted

My guess..

  1. Task Manager is showing you memory available for programs (your address space must also include addresses that map in to other devices with memory, like your video card - memory not available to run programs within

  2. I bet "Computer Properties" just rounds up/down to give a "simple" answer, you know, because that'd be "user friendly".

  3. (2074554368.0/1024)/1024 = 1978.44921875

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Plus 1 for this one. Plus Windows isn't the only one giving memory. The BIOS can also allocate memory at bootup. – surfasb Jul 1 '11 at 1:25

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