My 3570k on stock clock+intel HSF peaked at 70+ degrees in games. Current 4690k same setup hitting 80+ close to 90, stable 100 degrees at 4.6GHz.
Not sure if DC is just hotter or they did something with the HSF but they look identical to me. Both tests repeated with MX4 not stock paste.
The voltage regulator (hence fivr - fully integrated voltage regulator) for Haswell is on cpu instead of motherboard as with other generations. That component generates quite a bit of heat on its own which therefore accounts for the extreme rise in temperature
Hsf won't make much of a difference because it's basically the same and equally effective at stock...
TIM (I.e. the material between the die and IHS, integrated heat spreader, the piece of metal that your CPU specifications is engraved on) is alot worse because in Sandy bridge and HEDT cpu (x99, x79) it is actually soldered so temps then were alot better because heat conduction away from die is faster...
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