I am trying to get 5 7970 running on MSI Z77A-G45, only 4 properly install, one will get yellow ! mark in device manager. Tried 13.4 and 13.3 beta 3 on win7 x64. I am able to get 8 5000 series GPUs installed on the same board, so its not a limit of motherboard i think.
Halp?
edit: 13.1 wont work either
edit: nor 12.10
edit: nor 12.8
edit:
12.6 seems to have worked, but only for up to 5 up from 4! Included a picture down below. It seems the driver is -barely- scraping by as some devices have not successfully installed. It is possible they are linked to VRM temperature sensors since they are detected to be about 25C for both core and RAM VRM, but it's also possible the sensor is faulty since the other VRM sensors seem accurate. Also, included AMD APP for 12.6 seems slow/doesn't like RAM underclocking. 13.3 beta 3 AMD APP does not work with 12.6. The AMP APP with 13.1 is the highest compatible one that works with 12.6.
All cards are 1100 core and 340 RAM and 100% fan. Those fuckers are hot.
edit: 12.4 also has max of 5.
edit: 12.3 also has max of 5.
edit: 12.2 also has max of 5.