go for a ddr3 gfx card..all new mobos will support gfx cards even if they are ddr5..just make sure u have a pci-e slot and the right power supply..
ddr3 ram and ddr3 gfx card are not connected at all..if i mobo supports only ddr2 ram..doesnt mean it wont support ddr3 gfx cards..
and i guess...