
2-19
Chapter 2: Motherboard information
IMPORTANT:
• Forafullyconguredsystem,werecommendthatyouuseapowersupply
unit(PSU)thatcomplieswithATX12VSpecication2.0(orlaterversion)
and provides a minimum power of 230W.
• We recommend that you use a PSU with higher power output when
conguringasystemwithmorepower-consumingdevices.Thesystem
may become unstable or may not boot up if the power is inadequate.
2.8.2 Internal connectors
1. ATX power connectors (24-pin EATX_PWR1, 8-pin EATX_PWR2)
These connectors are for ATX power supply plugs. The power supply plugs
aredesignedtottheseconnectorsinonlyoneorientation.Findtheproper
orientationandpushdownrmlyuntiltheconnectorscompletelyt.
IMBA-Q87A ATX power connectors
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
EATX_PWR1EATX_PWR2
PIN 1
+12V DC
+12V DC
+12V DC
+12V DC
GND
GND
GND
GND
PIN 1
TPM1
S_PWRDWN
GND
+3VSB
NC
LAD0
+3V
LAD3
PCIRST#
FRAME
PCICLK
NC
CLK_RUN
SERIRQ
NC
GND
LAD1
LAD2
NC
GND
IMBA-Q87A TPM Connector
2. TPM connector (20-1 pin TPM1)
This connector supports a Trusted Platform Module (TPM) system, which can
securelystorekeys,digitalcerticates,passwords,anddata.ATPMsystem
also helps enhance network security, protects digital identities, and ensures
platform integrity.
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