Windows 7: Hissing in Realtek ALC662 Audio

Hi, Everyone

I just got a new computer and it has a realtek alc662 audio card on the motherboard built in. When I use the computer you can hear an audible hiss from the headphones and speakers when you move the mouse or when the hard drive spins up. I believe its some kind of interference but I can't figure out this problem.

Here are my specs

More details about my computer


Component Details Subscore Base score
Processor AMD Phenom(tm) II X6 1045T

Memory (RAM) 16.0 GB
Graphics NVIDIA GeForce GTX 550 Ti 7.3
Gaming graphics 4096 MB Total available graphics memory 7.3
Primary hard disk 1722GB Free (1863GB Total) 5.9
Windows 7 Home Premium

System
--------------------------------------------------------------------------------

Manufacturer BIOSTAR Group
Model TA870U3+
Total amount of system memory 16.0 GB RAM
System type 64-bit operating system
Number of processor cores 6

Storage
--------------------------------------------------------------------------------

Total size of hard disk(s) 1863 GB
Disk partition (C) 1722 GB Free (1863 GB Total)
Media drive (D) CD/DVD

Graphics
--------------------------------------------------------------------------------

Display adapter type NVIDIA GeForce GTX 550 Ti
Total available graphics memory 4096 MB
Dedicated graphics memory 1024 MB
Dedicated system memory 0 MB
Shared system memory 3072 MB
Display adapter driver version 8.17.13.142
Primary monitor resolution 1920x1080
DirectX version DirectX 10

Network
--------------------------------------------------------------------------------

Network Adapter Realtek PCIe GBE Family Controller



any help would be appreciated

also as a minor issue my speakers don't turn off when my headphones are plugged in.