Why the system can recognize 2GB memory but only 1GB is available

Although the minimum installation requirements for the WIN7 system are 1GB RAM, this memory can be very tight when the system is running. So many users will choose to buy a 1GB memory to upgrade the computer to 2GB capacity, but the system reaction speed changes little. Into the system settings to find that, although the system can identify 2GB memory, but only 1GB available, is the system is incompatible with memory?

Both the BIOS and the test software can recognize that the notebook has a total of 2GB of memory installed, but 1GB of which is unable to be called by the system. Generally speaking, the Win7 system will automatically recognize and use the newly upgraded memory capacity of the computer, but if we have used optimization software to optimize the memory parameters of the computer, it is more likely that this problem will occur when the memory is upgraded again.

Enter "Msconfig" in the Start menu search box, bring up the System Configuration window, go to the "Boot" tab and click the "Advanced Options" button, the original "Boot Advanced option" limit the system maximum memory capacity is only 1024.

Cancel the check box before "Max Memory", or enter 2048 in the Maximum Memory Capacity dialog box (depending on your actual memory size), click Apply.

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After restarting the system, you will be pleasantly surprised to find that the system "swallowed" 1GB memory finally came out, at this time the system available memory into 2GB?

Small tip:

The object of this article is often the early users of the computer from 1GB memory later upgraded to 2GB, before using optimization software to the computer's memory parameters have been optimized, and then did not change the memory parameters back. If you find that the memory part of the capacity is "swallowed", or show that the installation of memory is not available, you may wish to look for the method in this article.