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Chapter 4: Motherboard Connections
Chapter 4
Motherboard Connections
This section describes the connections on the motherboard and provides pinout definitions.
Note that depending on how the system is configured, not all connections are required. The
LEDs on the motherboard are also described here. A motherboard layout indicating component
locations may be found in
. More detail can be found in the
Please review the Safety Precautions in
before installing or removing components.
4.1 Power Connections
Two power connections supply the motherboard and several more supply for onboard devices.
Main Power Connections
Two Power Delivery I
2
C1/2 Boards (PDB), located at PSU1 and PSU2, are used to provide
main power to your system.
Important:
To provide adequate power to your system, be sure to connect the Power Delivery
Boards (PSU1/2) and all 8-pin PWR connectors (BP_PWR1/2/3 & GPU_PWR1/2/3/4) to the
power supply. Failure to do so may void the manufacturer warranty on your power supply
and motherboard.
Backplane Power Connectors & GPU Power Connectors
In addition to the main power headers, three 8-pin power connectors (BP_PWR1/2/3) are
used for backplane devices. Another four 8-pin power connectors (GPU_PWR1/2/3/4) are for
GPU device use. These 8-pin power connectors meet the ATX SSI EPS 12V specification
and must be connected to your power supply to provide adequate power to your system.
12V 8-pin Power
Pin Definitions
Pin#
Definition
1 - 4 Ground
5 - 8 +12V
PDB Cable Connectors for CPU3/CPU4
Two PDB (Power Delivery Board) cable connectors for CPU3 and CPU4 are located at J26
and J47. J47 is used for CPU3, and J26 is for CPU4. See the layout below for the locations
for J47 and J26.
Power Connectors for PCIe 3.0 x16 HIO Slots (J5/J6)
Two 6-pin power connectors used for PCIe 3.0 x16 High_Speed (HIO) slots are located at J5/
J6. J5 is used for the left side PCIe 3.0 x16 slot (P1_HIO_L1PCIE), while J6 is for the right
side PCIe 3.0 x16 slot (P2_HIO_R1PCIE). See the layout below for the locations for J5 and J6.