Is the Asrock g41m vs3 r2.0 will support ddr3 graphics card??

the memory (type?) of the gpu has nothing to do with the memory that you see in the board (in terms of compatibility)
if you have a board that uses ddr2 for example, as stated above by our kind sir, it will work, whether it is ddr2, 3 etc.

it is very common to think that it may not work, and believe me even store clerks sometimes say that it will not work. but think of it this way, if ddr2 boards will only work with (g)ddr2 gpu's and ddr3 to gddr3, then where can we find a board that uses ddr5? note that good cards are using (g)ddr5, but they work just fine.

anyway, hope this helps, and yes please, avoid those gt210 or gt510, or any gtX10 for that matter. they are slow as hell, unless you just use the pc to surf (in which case you are better off with the built-in gpu anyway