My replacement 4790K runs cooler than the previous one. Using the recommendations above, and under stress I now get a max temp of 75-79C after 5 minutes, rather than the old 99C after 1 minute. So things are much better.
One thing that I noticed, is that my old processor core #3 ran 10 degrees hotter than the others under stress. The replacement, cores 1-3 run about equally, but core 4 runs 5-6C cooler than the others under stress, and when it cools down at idle, it runs about 2C hotter than the others. Seems strange to me.
What's the reason for temp differences between cores?
I'm happy that no thermal throttling, turbo throttling, or core amperage throttling is happening to me anymore. Stock cooler.