I recently added a MSI R9290X to my computer. I also have an XFX R9280 DD Black OC edition installed, as this was my previous GPU. I was hoping to run the two in crossfire, but there is no crossfire option in Radeon settings. I have not installed a bridge because while I see the place to install it on the 280, the 290X does not have such a place to plug it in.
Can anyone confirm these two cards are or are not able to be run in crossfire mode together? I have viewed the compatibility chart, but couldn't understand it. I read that 290X uses PCIe instead of crossfire bridge. Does this mean it won't work in crossfire with very slightly older cards that do require the bridge?