I have a Gigabyte RX480-D5 with 8GB. It is installed into a Gigabyte GA-990FXA motherboard with an AMD Phenom 1055T running Windows 7. I am running an HP 2509m monitor on the HDMI port. Graphics driver version is 21.19.407. The card works fine in this older machine with occasional bug-wars or pixel screen after bringing the monitor back from sleep mode. No big deal.
Here's the problem. When the monitor goes to sleep, I get a constant device disconnect and reconnect "ba-donk,ba-dink" sound from my computer every few seconds. Constantly. CONSTANTLY. Whenever the monitor goes to sleep. Anybody have any ideas?