QPI/VTT Question?

[michaelmk86]

I have a i7 920 D0 with Vcore-1.24 3.8GHz 181 x 21 prime95 stable.

In the bios there is an option QPI/VTT Voltage(is set to AUTO by default) what exactly is that? Do I need to find the lowest possible QPI/VTT Voltage where the system is stable? Or should I just leave it like that.

 

[successful_troll]

http://lmgtfy.com/?q=QPI%2FVTT+Voltage+i7