Usually, VGA is better.
For a computer display, you’ll want to use the analog interface over an electrical one for a few reasons. The electrical signal will usually not work well over long distances and can be easily interfered with by numerous other electronic signals while the analog signal won’t be bothered by this. In addition, interference on an electrical interface will often cause garbled images or colors to appear or all color being washed out because of noise in the system while any interference on an analog interface would result in only black & white images appearing. Finally, data may flow through cables at different speeds when using an electrical connection vs. using dual wire connections which can create more latency than if you were using just one set of wire coupled with the analog signal. However, if you’re using an older CRT TV or display that only has a VGA interface then you’ll need to use the electrical variant. For future proofing, it’s best to use DVI as nearly all modern displays will include this interface over VGA.
VGA is analog while DVI is digital.
Generally, we recommend using the DVI connector with Apple computers because it’s built for high quality connections, and helps ensure that your video output remains high-quality, even if you’re connecting from long distances.
It all depends on the type of computer you are using. If your computer is older, then use VGA.
If it’s a newer laptop, probably HDMI or DVI-D *AND* DisplayPort. The newest monitors have what we call “ThunderBolt” which lets you daisy chain video and power between devices with no need for power cables or additional adapters and there’s also DisplayPort to connect monitors that don’t have ThunderBolt built-in. So now people are thinking about Display Port too because in addition to providing both sound and video signals, it can do without the need to carry out an extra cable for power! Essentially if you want something that works well over longer distances (think plugging the computer to a monitor that’s not right next to it), then go for either of these two.
VGA is an analog interface, DVI is digital, HDMI is also digital but if your laptop has HDMI output you can plug in some TVs too (note: most laptops now come with Thunderbolt ports which is basically like having Infiniband or an even faster version of PCI-Express which is used for multi-GPU setups so if you have a machine with Thunderbolt port, think twice before buying something else since it might soon be outdated).
So now, what you need to know is your cable length. If the cable length is short then CRT monitor is okay or just plug in a cheap VGA cable! But if the cable length is long then you need DVI, HDMI or DisplayPort.
DVI will always be better.
VGA cables are analog signals and have a maximum resolution at 800×600, while HDMI are digital signals and have a maximum resolution of 2048×1152. Though it would take much less bandwidth to send an HMI signal (both content and commands) than it would to send a VGA signal, the frame data rate is equalized over both types of connections. This means that because we can cram more data into each millisecond for HMI graphics than with VGA graphics, many high-end video cards ship with HDMI/DVI connectors in addition to standard VGA connectors and let you switch how displays see your output from one type or another. If your monitor only accepts analog inputs and you want to use digital ones, then all is not lost: You can purchase an analog-to-digital converter that plugs into your computer and plugs into your monitor/TV. As long as you’re at it, why not just go the whole way and get a DVI->HDMI cable? They’re cheap, effective, and may give you greater image quality than VGA connections.
VGA is analog, HDMI is digital.
Competition in the video card market is fierce. It’s hard to say who will have the better product, or when it will be released.
VGA. DVI is more of a connector that provides for the same resolution as VGA, but it can also carry video information and audio information with up to 8 channels.
In summary, DVI has the following advantages over VGA: (1) it can transmit video as well as audio over a single cable; (2) it carries an uncompressed digital signal; and (3) it supports high screen resolutions beyond 1600 x 1200 pixels. But, most displays sold today use a VGA connection. In other words, unless your computer supports HDMI or DisplayPort connections or if you need one of the three advantages listed above, use a VGA connection when connecting to your display.”
VGA cables are cheaper, but DVI cables can be used to display higher-definition video.
In the eyes of a computer programmer (like myself), high definition video is never going to replace our beloved ASCII art 😉 Still, when upgraded it will make your experience more fluid and take some of the load off of CPU resources that would otherwise be needed for drawing text. So I guess it might not be fully terrible if you like movies and want to run less nagging software in the background. You might even live longer!