AS ROCK N68C-S and DDR3 1600

Feb 11, 2019
Hello guys. I have this mother board : which supports also DDr3 1600 mhz memory. My question is,can i run DDR2 at the same time with DDR3 memory on this MB? or its better to buy 2x4gb DDR3 1600mhz?
As far as i know, AM3 socket supports both of DDR, but not at the same time- but this is dual channel, so i dont know if i can use combination: 2x2 + 2x2 or just 2x4 DDR2 stand alone, or 2x4 DDR3 also stand alone