User's Manual

ASUS B85-PLUS

1-13

• Due to USB 3.0 controller limitations, USB 3.0 devices can only be used under a

Windows

OS environment and after USB 3.0 driver installation.

• The plugged USB 3.0 device may run on xHCI or EHCI mode, depending on the

operating system’s setting.

• USB 3.0 devices can only be used for data storage.

• We strongly recommend that you connect USB 3.0 devices to USB 3.0 ports for faster

and better performance from your USB 3.0 devices.

• Due to the design of the Intel

8 series chipset, all USB devices connected to the

USB 2.0 and USB 3.0 ports are controlled by the xHCI controller. Some legacy USB

devices must update their rmware for better compatibility.

• Intel display architecture design supports the following maximum supported pixel

clocks (Pixel Clock = H total x V Total x Frame Rate (Screen refresh rate)):

- DVI port: 165 MHz

- VGA port: 180 MHz

9. USB 2.0 ports 9 and 10. These two 4-pin Universal Serial Bus (USB) ports are for

USB 2.0/1.1 devices.

10. DVI-D port. This port is for any DVI-D compatible device. DVI-D can’t be converted to

output RGB Signal to CRT and is not compatible with DVI-I.

11. PS/2 keyboard port (purple).

This port is for a PS/2 keyboard.

1.7.2 Internal connectors

1. Serial port connector (10-1 pin COM)

This connector is for a serial (COM) port. Connect the serial port module cable to this

connector, then install the module to a slot opening at the back of the system chassis.

The COM module is purchased separately.

B85-PLUS

B85-PLUS Serial port (COM) connector

PIN 1

COM