Just thought I would post this so everyone could know about the dangers of high VTT voltages with 45nm Intel CPUs. Anandtach referred to VTT voltage as "a ticking time bomb" and they destroyed their 1,000 dollar QX9650 CPU because of the high CPU VTT voltage. They also said they damaged their 9300 quad chip with high vtt as well.
Here is the link: http://www.anandtech.com/weblog/showpost.aspx?i=428
I had my vtt up way too high I realized, after reading this, so I hurried and toned it down. I found I could lower the VTT from 1.5v to 1.4v and it didnt affect my stability, I might try going even lower, I realize that in my testing, when I thought I needed more VTT, I probably just needed more NB voltage. Anyways, just a warning, because it sounds like VTT can kill the 45nm CPUs fast.