Hi, I have a self built system (naturally) and it's all going really well, except a slightly annoying sound i'm getting from my front panel audio connector, seems to be at it's worst when the PC is accessing one of the hard disks (there are 4 in the system). I use an Akasa Zen case and a Creative X-Fi sound card, can anyone explain it? Has anyone had a similar problem? Is there a solution for it? Any help would be appreciated.