Connectors
In most desktop PCs, this assortment is determined both by connectors on the "motherboard" and on a discrete graphics card, among which
VGA,
DVI,
HDMI output(there are models where
HDMI 2 pcs),
HDMI input,
DisplayPort,
miniDisplayPort. More details about them.
— VGA. He's D-Sub. Analogue video output with maximum resolution up to 1280x1024 and no audio support. It is rarely installed in modern devices, but it can be useful for connecting certain models of projectors and TVs, as well as outdated video equipment.
— DVI. Modern PCs can be equipped with both pure digital DVI-D and hybrid DVI-I; the latter also allows analogue connection, including work with VGA-devices through an adapter, and in analogue format has a resolution of 1280x1024. In digital DVI, this parameter can reach 1920x1200 in single-link mode (single link) and 2560x1600 in dual-link mode. The presence of a dual-channel mode must be specified separately.
— HDMI output. Digital output originally designed for HD content — high-definition video and multi-channel audio. The HDMI interface is almost mandatory for modern HD multimedia technology, and it is also extremely popular in computer monitors — so the presence of such an output on a PC provides ve
...ry extensive features for connecting external screens and even high-end audio devices. Some devices may even have 2 HDMI outputs.
— HDMI input. Your PC has at least one HDMI input. See above for details on the interface itself; here we note that it is the inputs of this format that are found mainly in monoblocks (see "Type"). At a minimum, this allows you to use the monoblock's own display as a screen for another device (for example, as an external monitor for a laptop). However, there are other, more specific options for using the HDMI input — for example, recording an incoming video signal, or transferring (switching) it to one of the PC video outputs.
Both the HDMI inputs and outputs in modern PCs may correspond to different versions:
- v 1.4. The earliest standard widely used today. Supports resolutions up to 4096x2160 and frame rates up to 120 fps (however, only at a resolution of 1920x1080 or lower), and can also be used to transmit 3D video. In addition to the original version 1.4, you can find improved v 1.4a and v 1.4b — in both cases, the improvements affected mainly the work with 3D.
- v2.0. The standard, also known as HDMI UHD, was the first to introduce full support for UltraHD 4K, with frame rates up to 60 fps, as well as compatibility with a 21:9 aspect ratio. In addition, the number of simultaneously transmitted channels and audio streams has increased to 32 and 4, respectively. It is also worth noting that initially version 2.0 did not provide support for HDR, but it appeared in update v 2.0a; if this feature is important to you, it's ok to clarify which version 2.0 is provided in the PC, the original or the updated one.
- v2.0b. The second update of the above v 2.0. The main update was the expansion of HDR capabilities, in particular, support for two new formats.
- v2.1. It is also HDMI Ultra High Speed: the bandwidth has been increased to such an extent that it became possible to transfer 10K video at 120 fps (not to mention more modest resolutions) as well as work with extended colour schemes up to 16 bits. The latter may come in handy for some professional tasks. However, note that all the features of HDMI v 2.1 are available only when using cables designed for this standard.
— Display port. A digital media interface similar in many respects to HDMI, but mainly used in computer technology — in particular, it is widely used in Apple computers and monitors. One of the interesting features of this standard is the ability to work in the daisy chain format — connecting several screens to one port in series, transmitting its own signal to each of them (although this function is not technically available with all screens for this interface). DisplayPort is also on the market in several versions, the current ones are as follows:
- v 1.2. The earliest widely used version (2010). However, already in this version, 3D compatibility and the daisy chain mode appeared. The maximum fully supported resolution when connecting a single monitor is 5K (30 fps), transmission up to 8K is possible with certain restrictions; a frame rate of 60 Hz is supported up to a resolution of 3840x2160, and 120 Hz — up to 2560x1600. And when using daisy chain, you can connect up to 2 2560x1600 screens at 60 frames per second or up to 4 1920x1200 screens at the same time. In addition to the original version 1.2, there is an improved v 1.2a, the main innovation of which is support for AMD FreeSync, a technology for synchronizing the monitor's frame rate with the signal from an AMD graphics card.
- v 1.3. An update introduced in 2014. The increased bandwidth made it possible to provide full, without restrictions, support for 8K at 30 fps, as well as transmit 4K images at 120 fps, sufficient for 3D work. Resolutions in daisy chain mode have also increased — up to 4K (3840x2160) at 60 fps for two screens and 2560x1600 at the same frame rate for four. Of the specific innovations, it is worth mentioning the Dual Mode mode, which allows you to connect HDMI and DVI devices to such a connector through the simplest passive adapters.
- v 1.4. The newest version widely used in modern PCs. Formally, the maximum connection speed has not increased compared to the previous version, but thanks to signal optimization, it became possible to work with 4K and 5K resolutions at 240 fps and with 8K at 120 fps. However for this, the connected screen must support DSC encoding technology — otherwise, the available resolutions will not differ from version 1.3. In addition, v 1.4 added support for a number of special features, including HDR10, and the maximum number of simultaneously transmitted audio channels increased to 32.
— miniDisplayPort. A smaller version of the DisplayPort connector described above, may also correspond to different versions (see above). Note that the same hardware connector is used in the Thunderbolt interface versions 1 and 2, and the graphic part of this interface is based on DisplayPort. Therefore, even some Thunderbolt monitors can be directly connected to miniDisplayPort (although it is desirable to clarify this possibility separately).
— COM port (RS-232). Serial port, originally used to connect dial-up modems and some peripherals, in particular, mice. However, today this interface is used as a service interface in various devices — TVs, projectors, network equipment (routers and switches), etc. Connecting to a PC via RS-232 allows you to control the operation parameters of an external device from a computer.PS/2
The number of PS/2 connectors provided on the back of the PC.
PS/2 (colloquially "pi-es in half") is a specialized connector with a characteristic round shape, used exclusively for keyboards and mice. Due to the advent of more advanced interfaces (USB 3.2, Thunderbolt, etc.), it is considered obsolete, but it is still found in certain PC models. This is due, in part, to the fact that the use of PS/2 peripherals allows you to free up more advanced ports that may be required for more demanding devices.
As for the quantity, PS/2 connectors are used for a maximum of two — one for the keyboard, the second for the mouse. There are configurations with one such socket — in such cases it is usually made combined and allows the connection of both types of peripherals, to choose from. However, it's ok to clarify these details separately.
USB 2.0
The number of full size USB 2.0 connectors on the back of the PC.
USB is the most popular modern interface for connecting peripherals. And the number of connectors is, accordingly, the number of devices that can be simultaneously connected to the rear panel without the use of splitters. Specifically, version 2.0 was the most popular some time ago, but now it is considered obsolete, it is gradually being replaced by more advanced standards like USB 3.0 (3.1 gen1). However, USB 2.0 capabilities (data transfer rates up to 480 Mbps) are still sufficient for many peripheral devices, from keyboards and mice to printers. So it's still a long way from the end of the standard, and some PCs may have
4 or more USB 2.0 ports on the back.
Separately, it should be noted that similar connectors can be placed on the front side of the case. However, for peripherals that need to be constantly connected to the computer, it is more convenient to use the rear panel, while the front placement is better suited for frequent connection / disconnection.
5.25" compartments
Number of 5.25" bays on the front of the PC.
One of the most popular ways to use such bays is to install DVD and Blu-ray drives, but they can also accommodate other components: “pockets” for removable HDDs and SSDs, card readers, and even specific devices like cooler control units. Accordingly, the more compartments, the more peripheral devices you can simultaneously install in your computer. However an abundance of 5.25 "peripherals is not often required in fact; on the other hand, it is recommended to install some types of devices not in a row, close to each other, but through a slot — for sufficient cooling efficiency. Therefore, most often the number of compartments of this type does not exceed 4 , but in some configurations it can be as high as 10.
mini-Jack (3.5 mm)
The presence of a mini-Jack connector (3.5 mm) on the front panel of the PC. More precisely, in ordinary desktop PCs, gaming systems and monoblocks (see "Type") there are most often two such connectors: one plays the role of an output for headphones, speakers, etc., the second plays the role of a microphone input. But in compact devices like some mini-Jack nettops, there can be only one — a universal port, in which you can turn on both headphones / speakers and a headset with one common plug for a microphone and “ears”.
Anyway, such connectors are closer to the user and are more convenient to connect than similar sound card outputs on the rear panel of the case.
Audiochip
The model of the audio chip (a module for processing and outputting sound) installed in the computer. Data on the exact name of the sound chip will be useful when looking for detailed information about it.
Modern PCs can be equipped with fairly advanced audio modules, with support for high-quality sound and extensive features. Thanks to this, some configurations can even be used for recording and other professional audio work. However, if you are planning such an application, it would not hurt to clarify the specific capabilities of the audio chip separately: it may well be that even an advanced workstation will still need an external audio card.
