So I have had this card since it was released. Its never been taken apart. Its a EVGA GTX780 SC It does need cleaning the fans are dusty but the heat sink is clean cause I blow it out often. A friend of mine says you need to redo the thermal paste every 3 months. And I seen a video where this guys gpu paste hardened into nothing almost. I am also slightly worried about it because if I mess up the card I wont be able to replace it. I do build computers but I have never taken a graphics card apart. I been watching videos on it. thanks for any advice