Win7 system desktop configuration 8G memory shows available memory only 3.4G how is it?

win7 system desktop configuration 8G memory display available memory only 3.4G how it happened

The specific steps are as follows:

1, start - run (enter msconfig) - click: OK or Enter;

2, in the pop-up "System Configuration" window, we click: Guide;

3, then we click: Advanced Options (V);

4, in the pop-up window of the advanced options, we see: the maximum memory is 256MB, and our configured memory is 8GB, so the problem is here.

Now we change the maximum memory to 8000MB, then click: OK, go back to & ldquo; system configuration window & rdquo; also click: OK;

5, in the pop-up & nbsp; system configuration & rdquo ; window, we point: restart (R), restart the computer;

6, after restarting the computer, we click: computer - properties, visible: installation memory (RAM): 8.00GB (7.40G available) Now the computer's memory is normal.