IMB520 / 521 LGA1151 ATX Motherboard
20
Board and Pin Assignments
2.5.17
PCI-Express x1 Slots (PCIe5)
This motherboard has two PCI-Express x1 slots.
Pin
Signal
Pin
Signal
B1
+12V_PS
A1
GND
B2
+12V_PS
A2
+12V_PS
B3
+12V_PS
A3
+12V_PS
B4
GND
A4
GND
B5
SMB_CLK_RESUME
A5
N/C
B6
SMB_DATA_RESUME
A6
N/C
B7
GND
A7
N/C
B8
+3.3V_PS
A8
N/C
B9
N/C
A9
+3.3V_PS
B10
+3.3V_SB
A10
+3.3V_PS
B11
PCH_WAKE_N
A11
PWRGD
B12
N/C
A12
GND
B13
GND
A13
CLKOUT_PCIE_P8
B14
PCIE5_SLOT_TX_DP_C
A14
CLKOUT_PCIE_N8
B15
PCIE5_SLOT_TX_DN_C
A15
GND
B16
GND
A16
PCIE5_SLOT_RX_DP_C
B17
N/C
A17
PCIE5_SLOT_RX_DN_C
B18
GND
A18
GND
2.5.18
Fan Connectors (FAN1~FAN3)
This motherboard has three fan connectors. Find fan speed option(s) at BIOS Setup
Utility: Advanced\HW Monitor\PC Health Status.
The FAN1 (4x1-pin p=2.54mm) is for the the CPU fan connector.
The FAN2 and FAN3 (4x1-pin p=2.54mm) are for system fan connectors.
Pin
Signal
1
GND
2
+12V
3
FAN Speed Detection
4
FAN Speed Control
Pin
Signal
1
GND
2
+12V
3
FAN Speed Detection
