Yeah, I have tried all kinds of stuff since 2012 and nothing seems to help.
Reapplying thermal paste to a better one, made no difference.
And the temperature is not the only one that worries me, but also the cards noise.
While idling, it does not bother me much, but again temperatures run as high as 54C which is ridiculous for this kind of card I believe.
Updating the drivers does not make anything.
Downclocking the card had a 20C effect on lowering the temperature, but still not good enough.
Normally I should be able to overclock this kind of card.
Also, I am always worried to buy a cooler since I don't know if it works for this card or not and they do cost as much as a better used card.