Why is the 3770 not cooling?

Question

Intel

Suddenly, the i7-3770 at 4.1 a year after 3.9-4.1 began to overheat a lot. I immediately changed the thermal paste, but it did not solve the issue. At the same time, the radiator is not to say that it is very hot. Under tasks, the processor can be kept within 72 degrees only at maximum cooler speeds.

cooler

I'm starting to think that the problem is in the thermal paste of the processor itself, which since 2012 could dry out. Could this be?