Sound cards can be added to a system that uses onboard sound or they can be upgraded to create a more balanced clear sound to match the new high-end speakers systems available now with satellite/subwoofer setups.
Upgrade/Add a Standard Live 5.1 PCI Sound Card
$Call
Upgrade/Add a Soundblaster 128 OEM PCI Sound Card
$Call
Upgrade/Add a Soundblaster Live 5.1 PCI Sound Card
$Call
Upgrade/Add a Soundblaster Audigy w/Firewire Port Sound Card
$Call
Upgrade/Add a Soundblaster Audigy 2 Platinum Sound Card
$Call
Your old sound card could potentially be traded in for savings against labor costs.