I read an article on Intel 4790k overheating thread that specifically stated not to use small fft with this CPU but i don't remember why. What is your max temp now?
I love the way it looks, especially the block! Nicely done.... So if you delidded your temps with small fft would be under 70c. I can see that CPU stable over 5.0 ghz with those frigid temps. What is your clock speed & volts right now?