Asus P5BV-C 4L User Guide - Page 48

8. ATX power connectors (24-pin ATXPWR1, 4-pin ATX12V1) These connectors are for SSI power supply plugs. The power supply plugs are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit. • Use of an ATX 12 V Specification 2.0-compliant power supply unit (PSU) that provides a minimum power of 450 W is recommended for a fullyconfigured system. • Do not forget to connect the 4-pin or 8-pin ATX +12 V power plug. Otherwise, the system will not boot up. • We recommend that you use a PSU with a higher power output when configuring a system with more power consuming devices. The system may become unstable or may not boot up if the power is inadequate. • You must install a PSU with a higher power rating if you intend to install additional devices. ATXPWR1 ATX12V1 +3 Volts +3 Volts Ground +5 Volts Ground +5 Volts Ground Power OK +5V Standby +12 Volts +12 Volts +3 Volts GND GND ® P5BV-C/4L +3 Volts -12 Volts Ground PSON# Ground Ground Ground -5 Volts +5 Volts +5 Volts +5 Volts Ground +12V DC +12V DC P5BV-C/4L ATX Power Connector 9. Backplane SMBus connector (6-1 pin BPSMB1) This connector allows you to connect System Management Bus devices (SMBus). Devices communicate with an SMBus host or other SMBus devices using the SMBus interface. ® P5BV-C/4L BPSMB1 1 FAN_PWM I2C_CLK# GND 12CDAT P2 +5V FAN_PWM P5BV-C/4L SMBus Connector 2-28 Chapter 2: Hardware information