It's likely that the games you are playing now are simply more demanding. Unless you know the original temps for a specific game or benchmark it's going to be difficult to know for sure.
It's also possible that your thermal paste has become less effective. Usually that won't happen in just a year but you could try repasting to see if that helps.
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…
