The situation is well expressed above I think. GIGABYTE products works better on Intel but I have a feeling that it uses the consumers like trial subjects on AMD products. I can give up using GIGABYTE but no way I'm gonna stop using AMD. This seems a shame to me to that these products have such big bias towards INTEL and give up on AMD.
From now on, as an AMD user, there is no way I will consider buying any GIGABYTE product. I'm gonna sell the one I have now. Have luck with INTEL users.
P.S: Thanks very very much sincererely for all the nice people here who tried to help me.