With those settings I don't think 60C is very realistic. I am at 4.0 with 1.19v with the loop in my sig (also EK-HF) and I am hovering around 60C.
However, I think 75-80C should be no problem for a i7 as I also run a i7 930 at around 80C 24/7 for the pas 1,5 years.