AS ROCK N68C-S and DDR3 1600

Feb 11, 2019
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Hello guys. I have this mother board : https://www.asrock.com/mb/nvidia/N68C-S/ 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