Motherboard I/O interface features large analysis

As one of the important parts of the computer, the motherboard provides a variety of slots to connect with other hardware devices, carrying the entire platform. With the increasing demand of users, the number of slots on the motherboard has gradually increased, especially the rear of the motherboard I/O become dense, dazzling people. For example, the integration of the motherboard video output interface from VGA to VGA+DVI+HDMI combination, these interfaces in the user more expansion potential at the same time, presumably also to a lot of users added a lot of confusion.

Are you aware of the complexity of the interface?

What is the difference between the same audio output interface?

The I/O interface described in this article does not cover all future interface types, but the majority of common motherboard I/O interfaces are still involved in the current market, hoping to help you choose and use your motherboard.

Mouse PS/2

Mouse PS/2

PS/2 interface is a more common interface in I/O interface, used to connect the keyboard and mouse, the two can be distinguished by color, purple keyboard, Green is the mouse.

Keyboard PS/2 Interface

Due to the current use of USB interface mouse More and more, many motherboards also subtract the green Mouse PS/2 interface. There is also a rare common PS/2 interface, which is very well recognizable, that is, half purple and half green.

Video Output interface

Video Output interface

At present, more mainstream video output interface a total of 3 kinds, respectively, VGA, DVI, HDMI. wherein the VGA interface is the use of analog signal transmission, DVI interface is the use of digital signal transmission, HDMI interface can achieve sound and picture output together, in the picture quality and DVI no difference. So in the output of the quality of DVI and HDMI interface is the same, better than the VGA interface.

VGA interface

The VGA interface is a type D interface with a total of 15 needles, divided into three rows and five in each row. It works by first converting the digital signal from the computer into an analog signal, sending the signal to an LCD display, and the display converting the analog signal to a digital signal. Most displays now come with a VGA interface for a wide range of applications.

DVI interface

The current DVI interface is divided into two, one is the Dvi-d interface, can only receive digital signals, the other is the Dvi-i interface, can be compatible with both analog and digital signals. For compatibility issues, the Dvd-i interface is generally used on most motherboards, which can be connected to a normal VGA interface via a switch connector. This DVI interface is found in more than 21.5-inch display, small-size display is not often seen.

HDMI interface

HDMI can simultaneously transmit audio and video signals, because the audio and visual signals using the same cable, this is very suitable for users to build HTPC platform, connecting large-size LCD TV.

USB interface

USB2.0 interface

USB is an external bus standard that regulates the connection and communication between a computer and an external device. The USB interface supports plug-and-play and hot-plug functions of the device. USB to date, there are three generations of connectivity standards, namely: 1996 introduced the first generation of USB 1.0/1.1 the maximum transfer rate of the second-generation USB 2.0 12mbps;2002 year, the maximum transfer rate of up to 480Mbps. and the USB 1.0/1.1 interface with USB 2.0 is compatible with each other; the third generation USB3.0 introduced in 2008 has a maximum transmission rate of 4.8Gbps and is backwards compatible with USB2.0.

USB3.0

At present, the motherboard with the USB3.0 slot motherboard has been very common, the price is very low, but the use of USB3.0 equipment is very small, currently a considerable part of the ordinary users can only use the USB3.0 slot as a USB2.0 slot.

E-sata interface

E-sata interface is an external SATA specification, in layman's terms, it is through a specially designed interface can be easily connected to the ordinary SATA hard disk, but the use of the motherboard is still the SATA2 bus resources, so the speed will not be tied to the traditional bus bandwidth, such as PCI, Speed is much faster than USB2.0 and IEEE 1394 interfaces. But this excuse itself does not power, so need external power. This excuse is mainly used for external hard drives.

USB PLUS

This is because the E-sata interface itself does not power, so there is the above figure of the USB plus interface, is the E-sata and USB2.0 combination, to solve the e-sata does not provide power supply defects, this excuse is common on the high-end motherboard.

IEEE 1394 Interface

IEEE 1394 Interface

IEEE 1394, referred to as 1394. Originally developed by Apple, known as FireWire (FireWire), is a platform-agnostic serial communication protocol. IEEE formally developed this bus standard in 1995, because the IEEE 1394 data transfer rate is very fast, very suitable for video image transmission, so it is used to connect the camera.

Fiber Optic Audio Interface

Fiber Optic Audio Interface

Fiber optic audio Interface is almost all the digital audio-visual equipment has a connector, mainly used to connect some of the more high-grade speaker products.

RJ45 Network Interface

RJ45 Network Interface

The RJ45 network interface is the most common I/O interface and is used in Ethernet with twisted-pair transmission media.

Audio Output interface

Next, let's take a look at the Audio Interface section, which is defined as shown in the following table:

2 channel front speaker output TD style= "BORDER:0;PADDING:0;" > TD style= "BORDER:0;PADDING:0;" >

interface	4 channel	6 channel	8 channel
Blue	Channel input	Channel input	Channel input	Channel input
Green	Channel output	front speaker output	front speaker output
pink	microphone input	microphone input	microphone input	microphone input
orange			Middle and subwoofer	Middle and heavy bass
Black		Rear Speaker Output	Rear Speaker Output	Rear speaker output
Grey				side-mounted speaker output

At present, the main board of the interface is divided into two, with the following figure of the 8-channel (6 3.5mm Jack) or 6 channels (3 3.5mm jacks) as shown above.

A point to note is that the mainstream motherboard integrated multi-channel sound card, want to open the multi-channel mode output function, it is necessary to correctly install the audio driver, and then set correctly, in order to obtain the multi-channel mode output.

Rare I/O interfaces

Basic obsolete printer LPT interface and COM interface still exist on some motherboard

Also, from some motherboards we can see the LPT parallel interface (the long pink interface in the figure) and the COM serial interface (9-pin green interface). Serial interface, referred to as the serial port, is the COM interface, is the extension interface using serial communication protocol. Parallel interface, referred to as an LPT interface, is an extended interface using parallel communication protocol. The functions of these two interfaces are basically replaced by USB, which is not necessary for ordinary users.

Summary: The above is the comparison of some of the more common I/O interface and its use, I hope that you will not look at the motherboard on the board that the colorful interface feel helpless, and in the purchase of the motherboard can be based on their own needs, select with the corresponding interface products.

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