its not a "motherboard" thing.. you need Win 7 (or 8) and a DirectX 11 compatible graphics card to get benefits of DirectX 11. A Dx11 graphics card will work in a Vista machine for example - but wont use Dx11 specific features.
You should be ok. I am willing to bet, that when your motherboard supports DX10, it has an onboard GPU which supports that. So as long as your GPU fits into the PCIe slot, you will be perfectly fine.
exactly.it has a onboard card.thats why supports directx11.thanksss