Quick question about dual channel memory

Simonl165

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Aug 17, 2015
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Quick question my pc came with 6gb ram a 4gb and a 2gb since them I've added another 2gb
The 4gb is in slot 1
Slot 2 empty
Slot3 has 2gb
Slot 4 has 2gb
The 4gb and the 2gb slots 1&3 are paired I'm thinking of getting maybe another 4gb
Am I for best results better off pairing the two 2gb sticks and if I add another 4gb pairing it with the other 4gb