Hi, were your temps ok with the same cooler a time ago? Or you always had barely the same temps? BTW I guess they will drop with an aftermarket cooler as the stock ones ar usually the simplest thing, but maybe the thermal paste has lost it's efficiency and replacing it should solve the problem. If you haven't done anything to the cpu, and if you had it for more than 3 or 4 years, it is very possible that the issue is the thermal paste and not the cooler.