Setting up xDMA confusion...

[UkGamer]

Ok system specs if needed are... windows 10 64bit, Asus crossblade ranger motherboard, 32gb ram (4x8gb), AMD Athlon X4 860K Quad-Core 3.7GHz 4MB.

 

I am currently using a very cheap graphics card as this is not an apu processor.

 

I want to buy 2x MSI AMD R9 380 Gaming 4gb cards 

 

as i understand it these cards utalise xDMA.

 

The question is how do you set them up... do you have to go into the bios or install anything, does one need to be set as a master and one a slave, i have tried searching for an answer but i cant seem to find any answers, my real question is when i get these cards, step by step what is it i have to do to utalise them in xDMA dual graphics 

 

please help and thanks for any help