Strange click during boot when Soundcard installed - is this normal?

[Sunbed]

Hey

Whenever my SC is installed (Asus Xonar DX) I hear two clicks during boot up, which sound like they are coming from PSU.

Are clicks like these normal? I've never heard them before with previous components.

PSU: Antec TP2 550W (about 2 years old - this a problem with my current spec?)

Soundcard: Asus Xonar DX (uses little 4-pin similar to floppy drives)

Thanks for help.

 

[Sunbed]

Ok thanks for your opinion. I was concerned that my PSU wasn't up to it. I also have two HDDs if that makes any difference.

Also my PSU doesn't have an 8-pin 12V plug, will that make any difference on stability?

EDIT: Ok thanks pduk. I'm getting BSOD's when I tried to unistall SC drivers, I think it's faulty so requested RMA and got through ok, apparently it happens occasionally with these cards. I was wondering if click was anything to do with it. Apparently not. thanks for help