hi there guys i was just browsing this forum when i came across this post anyway I used to have this prob in my old pc which also has a via chipset and a soundblaster live series card inside it.
After doing a bit of resurch on the good old web i found out the 2 most common reasons why this static happend.
1st reason is what Dilligaf1701 suggested the power supply might be the reason because faulty power supplies can certainly be the cause of this type of sound card noise.
And secondly it could be a motherboard/bios problem and there are 4 things you could do
1. upgrade the motherboard bios to the latest one.
2. change the PCI latency settings to a higher setting (this is the 1 i used and it worked). The defult setting of the bios PCI latency setting is 32 i changed it to 64 and it has worked since, there is also a tool you can use that changes the setting for you but ill have to look around the net for you for that just post back if you need it.
3. Change the sound card for a diffrent 1
4. i dont really recomend this 1 but if you do get p***ed off with the noise just chuck the pc out the window
If this has already been suggested to you i appolagise.