I'm dreading the power bill, but at the same time I guess I won't have to run the heat as high in the winter either now, that card dumps massive amounts of heat.
And really, as long as you don't have massive amounts of pet fur floating about, running with the side off and fan blasting on it is fine, had to run my K6 system that way during the summers.
But yeah, throughly impressed and pleased with the card so far, first time in 25+ years that I've been able to have a current gen high end model gpu (was usually either current gen but bottom tier, or prior gen mid tier) and it's very alien to me to not have to worry about how well a few will run, or what settings I'll have to reduce to get quality frames while not having the game look like total crap.