Asus B85M-E R2.0 User Guide - Page 23

1.7.2 Internal connectors 1. ATX power connectors (24-pin EATXPWR, 8-pin EATX12V) 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. B85M-E R2.0 A B EATX12V EATXPWR +12V DC +12V DC +12V DC +12V DC A +3 Volts GND +12 Volts +5 Volts +12 Volts +5 Volts B +5V Standby +5 Volts Power OK -5 Volts GND PIN 1 +5 Volts GND GND GND GND GND GND GND GND +5 Volts PSON# GND GND +3 Volts -12 Volts +3 Volts +3 Volts PIN 1 B85M-E R2.0 ATX power connectors • 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/8-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. 2. LPT connector (26-1 pin LPT) The LPT (Line Printing Terminal) connector supports devices such as a printer. LPT standardizes as IEEE 1284, which is the parallel port interface on IBM PC-compatible computers. B85M-E R2.0 SLCT PE BUSY ACK# PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0 STB# LPT PIN 1 GND GND GND GND GND GND GND GND SLIN# INIT# ERR# AFD B85M-E R2.0 Parallel port connector ASUS B85M-E R2.0 1-15