Maybe you need reboot your windows or intall ubunty?
I will try ubuntu tomorrow. I hear its a pain in the ass tho.
Make sure you are providing enough power to all of those.
Same thing happend to me so
Did you figure it out ? Was it just power ? I mean my afterburner don't see it only 8 of out 9. Windows see 9, Nvidia control panel see 9.... GPU-Z froze like claymores.