The ethernet card driver, with newer distributions, are default. If it's not, then you'll have to recompile the kernel. But in most distro's Forcedeth (YOUR ETHERNET DRIVER!) is pre-installed. I would recommend downloading ALSA from it's own site: www.alsa-project.org
too ensure you have the latest version.
Furthermore if you should choose to use ALSA from the kernel, you need the INTEL_HD_AUDIO module.
Since your motherboard is an AMD one, i'd also suggest taking this NVIDIA driver for your GFX Card: THIS ONE
You shouldn't need more.