well like I said above about how I'm now looking hard at the hybrid cards like the evga or the msi - and if I think you said you had a water cpu cooler on it now then something like the evga hydrocooper that just ties in to the cpu set up .
i don't know but i do see now where them type cards may be the thing with these high end gpu's where air may not keep up with todays demands on them unless under ideal room conditions
i guess at them temps you show do you get any throttling of the card with that ?? like said above could be crap sensor readings high or low
i figure if the card is not crashing - artifacting - shutting down - throttling bad or if all ,well???? so if you were having any issues inline with what i listed above it may not be too much of a worry
so if it seems the card is running and displaying 100% fine with out any issues other then it shows a little hot that may come down to a non issue overall ??