I hear a clock ticking in my speakers...

[Inikay]

Hi!

I got a new computer based on a ASUS A8N-SLI Deluxe. I didn't buy a sound card since the MB has 7.1 capability.

Now, when I turn on my loudspeakers, I hear a clock ticking interference... It really annoys me and prevents me from listening any sound without the irritating tick...

Help please?

Thanks,

Inikay.