Hi,
I`m not guru,but..
You have four slots on MB? Channel A and Channel B.You must put two DDR memory modules into the DIMMs with the same color in
order for Dual Channel Technology to work.
You have manual for that MB?If not,look on GA site.
Also update the bios, if you did not.
And finally, tell wich the memory model is (writes on the memory)
Note* Everest isn`t always right,trust BIOS