Can 1x 4gb plus 2x 2gb ram run in dual channel mode?

Jhawk55

Honorable
Feb 7, 2014
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10,510
Hi guys, this is my 1st post so please bear with me.

Currently I have 1x 4gb DDR3 12800 ram seat in the 1st slot (Total 4 slots). A friend of wanted to sell me his 4gb DDR3 12800 ram kit (2x 2gb). So will I be able to achieve dual channel mode? If no, will I really notice the different? Thanks in advance....