I usually just go with a USB wireless adapter -_-. Anyway yeah the 6990 sounds loud and while a GTX 590 is quieter it apparently blows up on a few people (exaggeration it's more like just a pop and some smoke
). Rather than a 6990 you should look at the 7970. Of course, you may want to wait to see how well the 7950 does and if it offers a better value than a GTX 580 or 570.