this link shows a german forum where i post my specs etc there are at the start.
i have 2 identical gpu´s
650w power supply
z170a gaming m3 mainboard
when i look at the crimson radeon settings 1 card is listed as primary and they showing the activity the second one showing as deactivated and no activity when i put a screen on the second one then the card activate.
i have no option to toogle the crossfire option on i already deinstalled the driver´s with ddu still no option the powersupply is correctly on
i saw that some people have their cards shown in one rider in crimson but my looks different
i have no idea how to activate the second card or toogle the crossfire option on
sorry about my english
ask me if i forgett something
There are actually two suggestions in the thread. The best answer recommends you reinstall the OS. I'm guessing you have Win10 which allows you to save your data and reset the PC (Settings--Update & Security--Recovery--Reset this PC). It's nice but you will lose most apps you've installed.
I would try the other suggestion first:
Uninstall all AMD driver software
Shut down the computer and install 1 GPU
Turn on the PC and see if the GPU is recognized by the OS (right click Start Button--Device Manager--Display Adapters). Hopefully there is no Yellow Exclamation Point by the GPU
If this is successful, shut down and install the second GPU
Turn on the PC and see if both GPUs are recognized without the exclamation point
If everything has worked up to here, now install the AMD Crimson application (be sure to download the latest version before you start this whole process)
I believe Crossfire is in Global Settings (Open Crimson--Gaming--Global Settings)
If you get the Yellow Exclamation point after you install the first GPU, install the drivers at that point as opposed to waiting until the end.