EVGA P55 FTW - Manual (Page 26)

EVGA Control Panel V2 (ECP)
For the convenience of users, EVGA has bundled an easy to Access Control
Panel:
To use the ECP, simply hook up the black ECP Cable to the motherboard at
the ECP header location. (See visual guide)
The other end of the Cable should be connected to the ECP as shown:
CPU Vcore voltage
Memory voltage
CPU VTT voltage
North-bridge of chipset voltage
CPU PLL voltage
QPI PLL voltage
I/O voltage of South-bridge chipset
South-bridge chipset voltage
Ground