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#1681
Well, a 3-4 degree drop will definitely make you feel better. Whether it really has a significant impact on your hardware is debatable. Sure, if you are attempting to overclock it to it's max, you need it cool to push if further. But if the chip operates just fine to say 70C, the difference between 42C and 46C isn't going to have much of an impact on the lifespan of the hardware.
In theory, the cooler temps are better, but it's not like at 42C it would run for 7 years and at 46C it will only last 3 years. It might be that it lasts for 6 years, 51 weeks, 3 days and 4 hours at 42 and 6 years, 51 weeks, 3 days and 3 hours and 57 minutes at 46C.