I had been ETH mining using Claymore's Dual Miner off two motherboards that would not take more than 4 GPU's. So I decided to switch over one of them and bought an H97 Anniversary. I added 8 GB of memory.
I am trying to run 5 GPU's to start, but only 3 are being recognized. This is after multiple installing an uninstalling Crimson 15.12.
When I pull up the other two in the Device Manager (which show errors) it says
"This device cannot find enough free resources that it can use. (Code 12)
If you want to use this device, you will need to disable one of the other devices on this system."
That seems odd to me since everyone seems to be able to get 6 GPU's on these boards. Any idea what I might need to do to accomplish the same?
What cards are you using?
What I found to work best to avoid this situation is ensuring all the cards you want in the rig are connected before installing Windows.
With initial boot restart, then install AMD drivers by going to device manager, selecting the primary card and updating driver software. After restarting again they should all be detected.