Windows 7: Windows 7 RTM x64 Optical Audio slow initializing

Hi

I have just built a PC based on a Gigabyte GA-MA785G-UD3H the PC is connected via optical cable to my 5.1 home theater.

What appears to be happening is that the optical connection is taking a long time to 'sync' with my home theater system - typically if I turn on the PC and receiver at the same time there can be a wait of about 30 - 40 minutes before things settle down and I get stable, clear audio. Up until this point, I am met with various pops and clicks and static.

I have tested the same home theater with my Mac Mini - and it works fine. I have also updated the sound drivers on my PC to the latest version published on the Realtek site.

I'm not sure if it's a Windows 7 issue, a motherboard issue or a bit of both.



Can anyone shed any light on this?