FUD Zilla writes Fermi will probably end up hotter than NVIDIA's previous generation:
Fermi is a big chip, so this doesn't come as much surprise. As long as it runs stable, people won’t complain about it too much. We’ve seen the card in person at least twice so far and we can tell that the first one we saw has a dual-slot air cooler and runs quite hot. However, this might not be the final revision that should ship later this quarter.