Asus B85M-F PLUS User Guide - Page 23
B85M-F PLUS ATX power connectors, ATX power connectors 24-pin EATXPWR, 4-pin ATX12V
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5. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) These connectors are for ATX 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. ATX12V EATXPWR GND GND B85M-F PLUS +3 Volts +12 Volts PIN 1 +12 Volts +5V Standby Power OK +12V DC +12V DC GND +5 Volts GND +5 Volts GND +3 Volts +3 Volts PIN 1 B85M-F PLUS ATX power connectors GND +5 Volts +5 Volts +5 Volts -5 Volts GND GND GND PSON# GND -12 Volts +3 Volts • We recommend that you use an ATX 12V Specification 2.0‑compliant power supply unit (PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 4-pin power plugs. • DO NOT forget to connect the 4-pin ATX +12V power plug. Otherwise, the system will not boot up. • We recommend that you use a PSU with higher power output when configuring a system with more power-consuming devices or when you intend to install additional devices. The system may become unstable or may not boot up if the power is inadequate. • If you are uncertain about the minimum power supply requirement for your system, refer to the Recommended Power Supply Wattage Calculator at http://support.asus. com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details. 6. Speaker connector (4-pin SPEAKER) The 4-pin connector is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings. B85M-F PLUS SPEAKER Speaker Out GND GND +5V PIN 1 B85M-F PLUS Speaker Out connector ASUS B85M-F PLUS 1-15