Just out of the box? I have been googling and asking people on IRC and could hardly find any information about this, the ones on IRC that thought they did usually got shot down by someone else saying it wouldn't work. So, yeah, can't trust IRC-kiddies.
Only thing I found is that CoreAVC decoder might work with their new CUDA-support which seems to be exactly this but I read that the quality is bad compared to a good hardware decoder for DXVA.
Gonna buy it either way in a week or two when I move to my new apartment but would be nice to know if it will work.