My motherboard model is Asus M4A89GTD PRO/USB3. & I am using a single 4gb stick of XMS3. Model is CMX4GX3M1A1600C9. But right now i want to upgrade my PC Ram. But I cant find any XMS3 model in the market. All are saying that this model is discontinued in India. They are suggesting me to buy the 1X4gb Vengeance Ram. I want to know can my PC support this Ram Including the XMS3 on board ? Please help me out. I already waste 6 month by searching XMS3. I have to upgrade my Ram Count as fast as possible.