Crackling sound when watching video and harddisk (Sata) activities

When I watch video using my P5Be Plus board, and I have harddisk
activities on my Sata drive, I get a lot of crackling sound. I read
that DMA is already set to be on for Sata. So I can't figure out where
I can change it so that the crackling goes away. Please help. Thanks
very much.

When I watch video using my P5Be Plus board, and I have harddisk
activities on my Sata drive, I get a lot of crackling sound. I read
that DMA is already set to be on for Sata. So I can't figure out where
I can change it so that the crackling goes away. Please help. Thanks
very much.