Hi there,
static can be caused by many things both hardware and software.
First thing to ask is, did you install Gigabyte's EasyTune6 software? If you did the try uninstalling this software.
What are your system specs? Could you post back with a full list of hardware that you are currently using.
Are you overclocking the system at all? If yes, revert the system to its default settings and see if that helps improve things.
I don't think that you can use a 32bit PCI card in a PCI-e slot as the slot is actually different.