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Where'd my RAM go?

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4 replies

by webmin88 1 view

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Hey guys I'm new. Well lets start with my question. My motherboard supports a full 32 GB of RAM, but I started small with 4 GB. I then decided to upgrade to 16 GB, and after a few bad runs with bad memory modules, I finally got a set of 4 4 GB sticks of RAM that is compatible with my motherboard. I installed the RAM and it worked beautifully all 16 GB showed up on Windows 7 Pro 64bit. Then one day maybe two weeks later, I noticed the Windows 7 was reporting 16 GB (12 GB usable). I ran a memory diagnostic and the memory checked out ok, so its as I said before, where'd my memory go? Any suggestions would be appreciated. Thanks.

4 replies

by oh smeg

Also did you save the changes after installing the RAM as you exited the BIOS?

Col

by markp24

Are you sure you have windows 7 Professional 64 bit? Because if you run a home edition it will behave this way.

Physical Memory Limits: Windows 7
The following table specifies the limits on physical memory for Windows 7.
Version Limit on X86 Limit on X64
Windows 7 Ultimate 4 GB 192 GB
Windows 7 Enterprise 4 GB 192 GB
Windows 7 Professional 4 GB 192 GB
Windows 7 Home Premium 4 GB 16 GB
Windows 7 Home Basic 4 GB 8 GB
Windows 7 Starter 2 GB

i hope this helps

by thechas

Open Control Panel, Performance Information and Tools, Advanced Tools.
Select Open Resource Monitor.

Select the Memory tab. You should see what processes are using memory and what memory is "reserved" or Cached.

Chas

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