In fact, 90% of the motherboard's external connectivity is in the rear panel, because some of the ports we can all access outside of the PC are connected to the inboard ports. In any case, this panel exists be able to communicate with all kinds of startups, from keyboard and mouse to monitor, through printers, home network and long etcetera.
So, let's take a look at what these ports do and what they're designed for.
The ports on the back panels are very common
Let's start seeing them from left to right and from top to bottom.
- PS / 2: This port has been lowered and few and few motherboards still have them. If you look at them they are two-color, cable-purple and mouse-green, because before, before USB installation, it was the colors that set it apart, as the audio connectors are still different.
- USB 3.0: known, they are different from USB 2.0 and 1.1 because they are blue.
- D-SUB or VGA: video result to connect the track.
- DVI: either Dual Link (DVI-DL) or not. Like the previous one, it's another video outlet to connect the track.
- Audio Audio Optical Release (S / PDIF): Used to connect digital audio systems. Unlike the minijacks connection, only one cable is required to operate.
- HDMI: well-known because it is of the highest quality today, works as a video output to connect the passenger, but can also be used for other audio systems.
- Showing: some video output that we can link to monitor.
- USB 2.0: As we mentioned earlier, unlike USB 3.0 in blue, this one is black to distinguish.
- SATA: Some external hard drive drivers still use this type of connector, which is nothing more than "External SATA". Currently not working.
- GBE LAN: Gigabit Ethernet LAN, connected to the motherboard network card, is where we need to connect the router with the RJ-45 connector cable.
- HD audio: Here we have only two or six connectors, and they are used to connect analog audio devices. If there are only two, they will be blue for the speakers and pink for the microphone. If there are six, the connection is as shown below:
- Orange: speaker or lower center.
- Black: background speaker.
- Gray: center speaker.
- Blue: line input This is the only connector, over the microphone, which is the input and not the output, and is used to connect external audio sources.
- Green: front speakers.
- Pink: Microphone insert.
Common bottom hole on mother boards
In the motherboard of the picture above we see three ports we didn't find before, and another curiosity. It is curious that instead of having a single PS / 2 combo port with the mouse and keyboard, it has a different, green mouse and keyboard keyboard. As for the three ports we haven't seen before, they're on the right side of PS2, and we'll see them.
- LPT (Purple gray, 25 pins): is the famous "port portal", already in use. Previously it was used to connect, above all, printers and plotters, as well as other TWAIN type scanners, and "licenses" licenses to use certain licensed software.
- Serial / RS232 Port (Green, 9 pins): today it is still active in industrial and commercial areas. It is used to connect all kinds of devices, from a portable scanner and barcode readers.
- RCA port (Orange): Although it may sound false, this port is for digital audio like S / PDIF.
Some of the ports we can find on the motherboard can be as follows:
- USB-C.
- Thunderbolt: well known, and now with Thunderbolt 3 uses the USB-C interface (previously used the mini DP interface as you can see in the image below). It works for everything, from data transfers to monitor monitors or charging devices.
- FirewireA: This data transfer connector also has three different modes (which you can see in the picture below), though it is currently lowered.
