I have been using my 290 for quite some time and I decided to get me a 390 and use dual monitors or crossfire. I moved my 290 down a slot and plugged in my 390. Now there is only drivers for my 390 not my 290. I have tried multiple ways to get both the drivers installed but it seems like whatever ever GPU I'm using for my main monitor is the one that has the drivers installed. So there is no option to crossfire in Catalyst. The 290's lights are on and so are the fans so I know it works. Any Help is greatly appreciated. Thank You!
Can you provide some more information about your system specifications including what Motherboard you are using?
What OS/Drivers are you using?
Have you tried putting the 290 in slot 1?
Have you got any sound cards or other devices in the PCI/PCI-E slots?