Open up msconfig.exe and go to the Boot tab. Then hit Advanced Options. Check and see if "Maximum Memory" is active. If so, untick it.
Also, you need to pair up the 2 2GB sticks in the same bank. Put the 4GB one in it's own bank. I don't have my G53JW here anymore, so I can't tell you which ones to use, but iirc, slots 1 and 2 are bank 1, and 3 and 4 are bank 2. Ideally, you want the 2 2GB sticks in Bank 1, and the 4GB in Bank 2. (1, 2 and 3 slots)
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