EDIT: Fixed, I don't need any more help with this, thanks ;)

As you might have or have not known, I have problems recording guitar.
I mean, it records, sure, fine.
But!
The sound is really really bad...

It usually happens when I play low frequency sounds repeatedly (powerchords), then sound then turns quiet and "hollow" with a lot of white noise.
I dunno why this happens, I tried recording both through line in and mic, both with and without the amp, same thing, even if I play clean.

I have a Gigabyte motherboard with onboard sound, but I looked online and people that have the same hardware as me can record fine.
All my drivers are up to date.

I dunno what the problem is.

Yes, I have tried different programs too, during real-time recording, the sound always comes out like that.

I recorded 2 soundclips to show you what I'm talking about:
This was recorded through line-in without any effects or distortion, just the clean guitar sound.
It gets worse if I add distortion

Clip 1, you can really hear the "hollow" sound at around 16 sec:
http://dump.stoleyour.net/uploads/63eb e398c4.mp3

Clip 2: http://dump.stoleyour.net/uploads/b13b fdb1d2.mp3