Do you have an onboard video? Cuz if you do you IGP wil take memory from your sticks of ram for itself.
3d mark 03 gives you detailed specs on your system including ram placement and such. Motherboards often label dimm slots wrong. Placing you ram in the right Dimm slots makes a huge difference.
Detailed specs on your system would help.
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*** SOCCER ***: 184.108.40.206:27015