hello everyone, can someone tell me the differnce between the CPU VVT and the VCore? I notice many people turn up their VCore to achieve high clocks but what about the CPU VVT? Any point of raising the CPU VVT?

I am currently running 400x9@3.6 w/ VCore 1.4025 in bios and CPU VVT 1.20 under water and would like to know the most efficient way to hit 4.0Ghz +