I have a 660ti OC from Gigabyte and when looking at the heatsink near the fan, it is slightly bent.
about 3 of the "blades" are bent down.
I handled my card very carefully when I installed it so I doubt I did it.
I think it's just cosmetic damage if anything..
My tempuratures for the card underload goes around 65-72C at the hottest. 30-35C idle.