Dual Graphics for A10 5800K and HD6670 won't enable


Jan 14, 2013
I've searched around quite a bit, but can't seem to find the info I'm looking for anywhere.

I have an AMD A10 5800K
paired up with a :
Gigabyte AMD Radeon HD 6670(1 GB, DDR3)

■Catalyst shows no option to enable dual-graphics.
■On-die gpu works fine without HD6670 installed.
■When HD6670 is installed, it disables on-die gpu.
■Speccy only lists the HD6670.

Anyone know what I should do? I've installed all the latest drivers for my system and catalyst. I've tried removing ALL video drivers then re-installing them, and I mean the 30-some odd-step process to completely remove them, not just CCleaner uninstall, but no success. The card by it's lonesome is working well enough, but not being able to bobo crossfire kinda defeats the purpose for my setup. Thanks in advance!

MB: BIOSTAR Group Hi-Fi A85W