Thank you for your response.
Eyefinity has specific requirements to drive multiple displays. In your case you are driving probably 6 HDMI displays simultaneously.
To do this you need to have 2 passive adapters such as the CAC-1101 Mini DisplayPort to HDMI & 4 active adapters such as the CAC-1153.
If you have native DisplayPort monitors you do not have this requirement.
In case you have more questions please refer to our Eyefinity Page