Sajin
To know 100% if it's the card you could have a local pc shop test it in their known good working system to see if they can reproduce your issue.
I'm looking into it but unfortunately there's hardly any decent PC stores close to me. The problems aren't occurring as often now since I uninstalled the audio driver, however once or twice I'm still hearing the brief audio distortion. This is always accompanied by a second's worth of lag in whatever program I'm using, it's even happened when opening a word doc.