ASRock Z77 OC Formula manual Serial port module, Including VCCM, Vccsa, DMI, PCH2, PCH, 8VPLL

SLI/XFIRE Power Connector

(4-pin SLI/XFIRE_PWR1)
(see p.14 No. 39)	SLI/XFIRE_POWER1

It is not necessary to use this connector, but please connect it with a hard disk power connecor when two graphics cards are plugged to this motherboard.

Serial port Header	This COM1 header supports a
(9-pin COM1)	serial port module.
(see p.14, No. 40)

HDMI_SPDIF Header

(2-pin HDMI_SPDIF1) (see p.14, No. 42)

1

GND

SPDIFOUT

HDMI_SPDIF header, providing SPDIF audio output to HDMI VGA card, allows the system to connect HDMI Digital TV/ projector/LCD devices. Please connect the HDMI_SPDIF connector of HDMI VGA card to this header.

V-ProbeTM	Users are able to measure
(7-pin VOL_CON1,	onboard components voltage,
7-pin VOL_CON2)	including VCCM, VCCSA,
(see p.14, No. 13)	VTT2, VTT1, VCORE,
	DMI_COMP, XCLK_RCOMP,
	DMI, PCH2, PCH and
	1.8V_PLL.

VCCM: DRAM voltage

VCCSA: CPU system agent voltage

VTT2: Main VTT voltage

VTT1: 2nd VTT voltage

VCORE: CPU core voltage

DMI_COMP: DMI COMP voltage

XCLK_RCOMP: Internal clock gen COMP voltage

DMI: DMI voltage

PCH2: Chipset core voltage

PCH: 2nd chipset core voltage

1.8V_PLL: CPU PLL voltage

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