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DVI vs VGA

Last response: in Graphics & Displays
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February 24, 2004 8:30:22 PM

Is DVI really better than VGA for LCD's. If so, how? Does it increase the refresh rate? I have a 19" NEC LCD and I was wondering if I could squeeze anything else out of her.

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February 24, 2004 8:46:58 PM

It really depends on the monitor, some look better with DVI and Vice Versa. I know that my LCD looks much better using DVI, as using VGA It always has a green tinge, even if i compensate for the colour. You should try both connections and see what you like best.

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February 24, 2004 8:51:34 PM

Are you using a DVI-D cable? Is that the same one that I should use?
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February 24, 2004 8:54:58 PM

The biggest difference is that using DVI, the monitor is recieveing a digital signal. Using VGA, it's an analog signal.

I don't see how this could affect refresh rates, but then again I'm not an expert on this particular subject...

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a b U Graphics card
February 24, 2004 11:30:23 PM

Video is digital to begin with. First it has to run through the RAMDAC to be analog (VGA), then it has to be converted back to digital by the monitor. This will cause a loss of some data, so that's why DVI SHOULD be better for flat panels.

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a b U Graphics card
February 25, 2004 3:38:33 AM

The problem is the Bandwidth of the DVI connectors, which is based on the TDMS used. Single allows a max of 60hz usually @ 1600x1200, but sometimes up to 1920x1440 if a rare high end chip. Usually to push above 16x12@60hz you need dual TMDS on a dual capable cable.
Most gaming cards will usually max out the bandwidth of the DVI connector @ 16x12x60hz with their single TMDS. But look at this review and see how cheaper and slower parts quickly restrict your resolution.

<A HREF="http://www.extremetech.com/article2/0,3973,1370500,00.a..." target="_new">A Good Comparison of DVI Quality by ExtremeTech</A>, which also should give you a little bit better understanding of DVI.

The VGA connector can be better but requires more tweaking usually and alot more money and gear. For the average user the DVI will give you truer colour and better picture. However, it really depends on what you find works best with your setup, nothing is a sure thing for either.


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February 25, 2004 1:42:11 PM

Yeah I was using the DVI-D cable that came with my monitor, and a Gainward Geforce 4 Ti4200, running my LCd at 1280x1024 60Hz (Putting it up to 75 makes no visual difference).

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