MSI X99S GAMING 9 AC - Manual (Page 42)

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Voltage Checkpoints
These voltage checkpoints are used to measure the current system voltages. A
multimeter (not included) will be required to check voltages.
FV1: V-Check Connectors
To check the voltage, please use the optional voltage checkpoint cables included in
the motherboard package. Attach the positive lead of the multimeter to the voltage
checkpoint cable and the negative lead to the ground connector.
VPP01
GND
1
9
VPP23
DDR23
DDR01
VCCIN
CORE
GND
GND
Connector Description
GND (pin 7~9) Ground
CORE (pin 6) CPU core power.
VPP23 (pin 5) VPP VR power source for channel C/ D DDR memory.
VPP01 (pin 4) VPP VR power source for channel A/ B DDR memory.
DDR23 (pin 3) Memory voltage for channel C/ D. The DDR memory voltage
is the voltage supplied to the DDR memory modules on the
motherboard. Lower memory timings may require higher
voltages to maintain system stability.
DDR01 (pin 2) Memory voltage for channel A/ B. The DDR memory voltage
is the voltage supplied to the DDR memory modules on the
motherboard. Lower memory timings may require higher
voltages to maintain system stability.
VCCIN (pin1) The CPU VCCIN voltage is the CPU power source that is
shared with components of the CPU.