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Installed Memory vs RAM Usable by Windows

@ 2010/06/15

Most PC users are familiar with the 4GB system memory limitation of 32-bit Windows Operating Systems, which is why 64-bit computing has become the standard for computer enthusiasts. Occasionally though, a computer system will not report the correct amount of RAM installed. In this article, our 64-bit Windows 7 test system had 6.00 GB of installed memory but indicates only 4.00 GB usable RAM available. While some may dismiss this as a case of defective RAM, you might be surprised by the culprit.

Comment from jmke @ 2010/06/15

Quote:

Originally Posted by thorgal

This happens to me too from time to time. What you need to do in most cases is reseat the CPU, not replace it.

had this happen too; culprit turned out to be the motherboard

Comment from Kougar @ 2010/06/15

Agreed. Damaged socket, mis-aligned CPU, or even overly aggressive RAM settings. I can't imagine the CPU controller being "bad" unless a memory controller was degraded through overclocking?

Comment from thorgal @ 2010/06/15

This happens to me too from time to time. What you need to do in most cases is reseat the CPU, not replace it.

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