I was finally able to hit 4.0 with turbo on which I am happy with, but it is not stable past 45 minutes, but I have not played with voltages too much, due to time but I am happy with running 3.9 24/7. My max temps are 77 on core 1, and the rest are in low 70s. My voltages are as follows
CPU +0.110, which works out to be 1.360 with turbo on, and about 1.30 with it off
QPI: +.120V, which if I am using the right defualt of 1.12,. makes it 1.24V
My QPI link is auto, but I am getting in Memtest +86 an auto setting readin 6.6 gt/s, which is high, I am going to try and bump that down to see if I can get lower voltages with a 4.8 manual set QPI link speed.
My BCLK is 185.5Mhz.
My CPU under load goes back down to a multiplier of 20, when 5 threads or more are under 1005 load, and it goes down to 3730Mhz, and my voltage drops about 0.07, down. Here is proof of both.