Urban legends in computers: The quality of HDMI cables

Computer science also has its urban legends. One of them is  HDMI cable quality, legend that benefit manufacturers and based on ignorance and false conclusions. For example, a user finds that his old HDMI cable supporting protocol 1.1 (he ignore this) does not work with a new monitor that requires at least 1.3. He then buys a new  "better" cable and it works well ... because it supports the latest protocol. A  cheap 1.3 or 1.4 cable would had the same effect. The conclusion that a more expensive cable is required is quite unfounded.

Cable hdmi
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A thing to know about HDMI cables, is that it transmits a digital signal is that unlike analog cables (like VGA or DVI), there is no signal quality, it is always a suite of 0 and 1. No need to buy more expensive cables, they can only produce the same result.
If the cable is long, a loss of signal is possible depending on the environment regardless of the type of cable, according to studies conducted by magazines.
A comment from a customer:

"This cable is a great value. Seems to work at least as well as the $5 cables you can order over the internet."


Another urban legend is that we need to have VGA connectors on  PCs and video monitors.

VGA, DVI, HDMI adapters

When will we be rid of VGA? When will we emerge from the vicious circle of connectors added to monitors to be compatible with older computers or added to computers for compatibility with older monitors?
VGA is 20 years old, it includes an unnecessary analog electronics with digital monitors of now and delivers lower quality graphics.

Breaking the vicious circle would be easy if the public could know that there are inexpensive adapters for connecting different connectors between them!

Converting DVI to HDMI or vice versa is easy and inexpensive with a mixed cable or adapter. We sacrifice just the sound. From  VGA to HDMI, or vice versa is just as simple providing the DVI port supports an analogic signal. Transfer between VGA and HDMI if we believe forums is problematic. Cables are available, but they are not intended for PCs, but for consoles instead, they support analogic. But there are cheap signal converters.


This adapter connects a computer with a VGA output to a video monitor with a DVI analogic input, and costs around US$ 4


This adapter connects the DVI analogic output from a computer to an old VGA monitor.
It costs around US$ 4.


These adapters connect a digital DVI to HDMI connector on the computer to the monitor or vice versa. In any case we lose the ability to transmit sound with the video signal, which is not supported by DVI, and it must be sent separately (as would be the case with two DVI connectors). Costs around US$ 8.

HDMI / VGA cable

To connect a HDMI analog output to the VGA connector. NOT FOR PC TO MONITOR. A converter is required to that.

VGA / HDMI cable

A cable connecting a PC's VGA connector on the HDMI connector of a console or any analog device, NOT A VIDEO MONITOR. A converter is required to that.


You can connect a second monitor through the USB port, with any type of connector on the video monitor. The image can duplicate the image of the primary monitor or supplement it with a different view.

Several adapters are available for output to connect a VGA, DVI or HDMI cable.

USB / PS/2

We do not need PS/2 connector for mouse or keyboard. Connecting a PS/2 mouse into a USB port or vice versa is common for a long time with these adapters, which cost around US$ 4.

DisplayPort / HDMI

To connect to an HDMI monitor, the adapter costs about US$ 15.

You can find all these adapters in online stores including Amazon or on specialized sites.

In conclusion, we do not need VGA on PCs and especially laptops that have their own screen. And for monitors, if they come with a mixed DVI and a HDMI , they can be connected to any computers.

Update. December 9, 2010