I have a A10 5800k + HD 6670 1GB GDDR3
And dual graphs are not working, I've activated the option PCI-Express on Prymary Graphics and dual graphics option in BIOS and Catalyst too and still not working.
When my video card is installed, I've noticed that the processor is overloaded too much when I play. Then I uninstalled the video card and in the BIOS I enabled the option AUTO on primary graphics adapter, and playing only with the APU I realize that I have the same performance and the processor has lower workload.
I've installed the current drivers, I installed the video card on other computers and it works perfectly.
My motherboard is an ASROCK FM2a75m I thought that could the problem and need to switch to an A85X chipset.
I have 8gb of RAM Kingston ddr3 1866MHz. Any help?