I have a two questions.
first, Is it possible to do CrossfireX with R7 Graphics APU(A10 7850)+ R7 360 Series(Asus AMD Radeon R7 360 OC 2GB GDDR5)
and second question, if yes, how does it work? I tried to change the priority in the bios, making APU be the main , and set in amd crimson, but i did not found the setting in this software, how should I proceed?
No it is not compatible. You'll need a R7 250 DDR3/5 Oland part which features 384 shaders. Be careful, there is a Cape Verde MSI R7 250 that features 512 Shaders and is not compatible with Dual Graphics.