so I found bit coin and now I am fascinated. It seems really interesting, but I have a few questions.

I run ubuntu linux and I'm going to be putting the 6950 in my main pc, so it isn't going to be a dedicated rig, but anyways if I'm running the gpu mining client will it bog down my computer while i'm using it? how many watts will this gpu be using? and what will happen if i try to run a gpu accelerated video in mplayer while I am mining? or if i try to run a 3D game while I am mining? is the gpu miner low priority so it'll only use free resources?