Adapter 2 - ATI Radeon HD 5900 Series
Sensor 0: Temperature - 100.00 C
Too hot.
The rest are OK in my opinion, but 100C sustained temps are not so great.
Mine all range in the high 70 - low 80C range and I'm comfortable with that.
Consider that most cards will thermal throttle at ~110C, and you can see how that might be a little too warm.