What are the determinants of computer graphics quality

According to market research found that in the past two years many DIY enthusiasts and some graphics companies over the pursuit of graphics card 3D performance. In their eyes, the graphics card 3D performance determines the quality of the graphics card, but is it true? In fact, I think, look at a graphics card can not only look at its 3D performance, but also to see the final appearance of the quality and other factors that cannot be ignored. If you think of 3D performance as a manifestation of intrinsic performance, so the final display on the screen is good for the player will be more intuitive, otherwise, even if the 3D performance is strong, if the use of a messy color to display, or inadvertently appear biased color even interference stripes, it is unbearable. So which parts of the graphics card will affect the final picture? What are the determinants of computer graphics quality?

1, the number of layers and quality of the PCB determines the video signal purity of the graphics card

First of all, the graphics card's PCB substrate quality and the number of PCB layer to a large extent, determines the graphics of the good or bad. Theoretically, the more PCB layer, the more the electrical signal interference between the less, so it can make the final output of the video signal more pure. For example, if the phone is placed on the signal line of the monitor, once the phone is in a call, it will be because of the high power signal generated by cell phone calls and interference to the display data line, resulting in the display of the picture jitter. The same reason, if the PCB generated a large number of noise, it will directly affect the output of the graphics card image quality. Although there will be no picture jitter so serious situation, but for some details of the description of the picture, will have a great impact.

2. Low-pass filter circuit determines the resolution of high resolution of graphics card

In addition, the low pass filter circuit of the graphics card will also play a decisive role in the quality of the picture. The so-called Low-pass filter circuit the biggest function is to filter out the video card output signal high-frequency noise, so that the screen on the display more clear and bright. In addition, Low-pass filter circuit is good or bad the most intuitive performance is the high resolution of the output clarity. For example, some graphics cards in the medium resolution of the quality performance can be adjusted to the resolution of 1080P immediately appear in the watermark phenomenon, which is the low pass filter circuit shrinkage the most obvious performance. So where is the low pass filter circuit of the graphics card? Generally speaking, Low-pass filter circuits are usually located behind the graphics d-sub analog output interface, and consist of some small black or white SMD components. Generally speaking, the more the number of patches, it shows that the Low-pass filter circuit is more perfect.

3, the video output interface shielding cover is also very important

Finally, the signal shielding capability of the graphics output interface will also determine the quality of the graphics card. Take the most commonly used DVI interface as an example, some graphics cards will add a metal shield on the DVI interface, while others will directly expose the DVI contact points. In fact, the DVI interface metal shielding and Low-pass filter circuit function is very similar, but the former is to prevent the external high-frequency signal entry, and the latter is the high-frequency signal filtering. In addition to the metal shielding cover folk there is a way to shield off the video card generated part of electromagnetic radiation, in order to reduce the computer radiation on the human body damage. Of course it's probably just a play, but for a metal shield it's always better than nothing.