Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

When connecting a PC to a monitor, are there any significant performance penalties when using the various types of monitor cables? e.g. Should I expect different performance between the following:

  • VGA-to-VGA
  • DVI-to-VGA
  • VGA-to-DVI
  • DVI-to-DVI

I know that the pure DVI cable is better because the computer doesn't have to translate the signal from analog to digital. But is that really of concern nowadays?

share|improve this question
up vote 3 down vote accepted

I can't see there being a performance hit as the converter is just modifying the signal coming out of the computer, and the signal processing is done in real-time.

In a previous job dealing with real-time 3D graphics we made extensive use of extension cables and splitters and never noticed any performance issues (lag, reduced frame rate etc.).

share|improve this answer

No, this doesn't matter. The output of your graphic cards is always digital and is converted to plain old analogue vga by a "dumb" converter which has no influence to the rest of your pc.

There's one thing to keep in mind: When using DVI-D to DVI-D on a HDCP (High-bandwidth Digital Content Protection) enabled monitor there may be an impact to the performance. You'll need an HDCP-enabled display to playback blu-ray etc., theres some encryption being applied to your output.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.