DVI types explained with images

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DVI types explained with images

Postby Sethioz » Tue Apr 30, 2013 3:45 pm

DVI - Digital Video Interface
This is what most monitor and video cards use nowdays, in fact all i guess. some still have VGA and some have HDMI too. If you look at the DVI, sometimes they look different, so here's explanation of what is what and what you need and why some are different...etc.

Most common (i think) is DVI-D, where that D should stand for Digital (not sure).
then there's also DVI-I, this is most common on video cards, but now they started to remove it. so what is DVI-I?
DVI-I - I stands for Integrated, it supports Digital and Analog signals. Analog is VGA on older monitors.
there's also DVI-A, which is Analog only.
So best is DVI-I, but most common is DVI-D.

DVI cable types
DVI-D - Digital Video Interface - Digital - This is most common nowdays as all new devices use only Digital video (monitors, graphics cards, TVs ..etc)
DVI-I - Digital Video Interface - Integrated - Best choice as it supports Digital and Analog video, can be used on either, VGA or DVI monitors / devices.
DVI-A - Digital Video Interface - Analog - This is the old Analog signal that is used in VGA monitors and cables, can be used to output to older LCD monitor that has only VGA input.

Here are some pictures to show you which cable is which and how to know what you need and when and where.

all-DVI-types.jpg

dvi_types.jpg



What is the difference between Dual-Link and Single-Link ?
It's quite simple, dual-link has twice the video bandwidth, meaning it can display higher resolutions.
Single-Link is 2.75mp (megapixels) and should allow maximum widescreen resolution of 2098×1311 (if you do the math, it is 2750478, which is 2.75mp)
Dual-Link should double the bandwidth of Single-Link, giving you 5.5mp resolution in total.
There are almost no devices in the market nowdays that use higher resolution than 2098x1311, so there is no need for dual-link really.

HDMI - why is this here?
HDMI is also Digital, meaning you can easily convert between HDMI and DVI without losing any quality. Only difference between HDMI and DVI, is that HDMI can transmit audio and video, while DVI is only Video. However you can't convert HDMI/DVI into VGA (analog) and have same quality, analog monitors and cables simply do not support Digital signal, so you will lose quality if you use VGA only device somewhere in the system.
HDMI - High Definition MultiMedia Interface

Hopefully this explains everything you need to know about DVI cable types.
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