IMB520R / 521R LGA1151 ATX Motherboard
Board and Pin Assignments
11
2.5
Connectors
Signals go to other parts of the system through connectors. Loose or improper connection
might cause problems, Make sure all connectors are properly and firmly connected. Here is a
summary table showing the connectors on the hardware.
Connector
Description
CN1
PS/2 KB/MS Connector
CN2
DP/HDMI Connector
CN3
DVI-D/ VGA Connector
CN4
Audio Jack
CN5
RJ45 + USB3.1 GEN1 Connector
CN6
RJ45 (iAMT)+ USB3.1 GEN2 Connector
CN8, CN9
Internal PS/2 KB/MS Connector
CN11
Front Audio Header
CN14
PCI-Express x16 Slots
PCIe1 ~ PCIe4
PCI-Express x4 Slots
PCI1
PCI Slots
PCIe5
PCI-Express x1 Slots
CN15
External Sensor Connector
CN16, CN17, CN20
Internal USB2.0 Headers
CN21
Internal USB3.1 GEN1 Connector
CN23
TPM 2.0 Connector (Optional)
CN24
Front Panel Header
CN25
DIO Connector
CN26
24-pin Power Input Connector
CN27
Voltage Monitor Header
CN28
SMBus Header
ATX2
CPU Power Input Connector
COM1
Comport Connector
COM2 ~ COM6
Comport Box Header
FAN1
CPU Fan Connector
FAN2, FAN3
System Fan Connectors
PCI1 ~ PCI4
PCI Slots
SATA1 ~ SATA4
SATA III Connector