BIOS says 8GB RAM installed but only 6GB is available

Posted by Hiroshi on Super User See other posts from Super User or by Hiroshi
Published on 2011-11-16T18:51:39Z Indexed on 2012/12/02 17:08 UTC
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dell-xps

my machine is a Dell Studio XPS 9100 with 8GB of RAM installed. When I open the BIOS setup and enter the System Info, it shows that my machine got 8GB of RAM installed but only 6GB is available (yes this is from the BIOS only). In Windows 7 (64bit Pro) it shows only 6GB of RAM are available. But if I run CPU-Z then it can detect all 8GB RAM. The machine came pre-configured and I have never opened the case before.

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