| Author |
Message |
Rick Knight
Guest
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 Posted:
Fri Nov 11, 2005 2:29 am Post subject:
DVI vs VGA |
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I have a new monitor, and graphics card. Both have DVI-i and VGA
connections. Can someone tell me the advantages of one over the other?
The monitor is an HP 1755 Flat Panel, the graphics card is an nVidia
6600GT 128 AGP. Os is linux, kernel 2.6.10 with Xorg 6.8.2.
Thanks,
RickKnight |
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Tom Dauphin
Guest
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| Posted:
Fri Nov 11, 2005 2:59 am Post subject:
Re: DVI vs VGA |
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DVI is digital; VGA is analog
"Rick Knight" <rick@rlknight.com> wrote in message
news:pan.2005.11.10.20.29.02.549783@rlknight.com...
| Quote: | I have a new monitor, and graphics card. Both have DVI-i and VGA
connections. Can someone tell me the advantages of one over the other?
The monitor is an HP 1755 Flat Panel, the graphics card is an nVidia
6600GT 128 AGP. Os is linux, kernel 2.6.10 with Xorg 6.8.2.
Thanks,
RickKnight |
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Phil Weldon
Guest
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| Posted:
Fri Nov 11, 2005 4:25 am Post subject:
Re: DVI vs VGA |
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The VGA connector supplies timing signals and ANALOG signals to the monitor;
Red, Green, and blue. CRT monitors have three electron beams, one each for
Red, Green, and Blue that are angled to hit only the Red, Green, or Blue
phosphor just behind the faceplate of the tube. The intensity of these
beams is controlled by an analog signal.
The DVI connector supplies timing signals and DIGITAL signals to a display
device that controls color intensity with digital signals - either intensity
of pixels as with LCD monitors, or timing as with plasma or DLP displays.
If analog signals are used as input to a LCD, for example, these signals
must be converted to digital at the display. Which is not so hot because
the display adapter produces the image in digital and in this case then
changes it to analog whereupon the display must convert it back to digital.
Some LCD displays have an analog input; better results come when digital
display devices receive a digital signal without the unecessary pair of
conversion from digital to analog to digital.
In your case, use the DVI out and DVI in for best results.
Phil Weldon
"Rick Knight" <rick@rlknight.com> wrote in message
news:pan.2005.11.10.20.29.02.549783@rlknight.com...
|I have a new monitor, and graphics card. Both have DVI-i and VGA
| connections. Can someone tell me the advantages of one over the other?
|
| The monitor is an HP 1755 Flat Panel, the graphics card is an nVidia
| 6600GT 128 AGP. Os is linux, kernel 2.6.10 with Xorg 6.8.2.
|
| Thanks,
| RickKnight |
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Lars-Erik Østerud
Guest
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| Posted:
Fri Nov 11, 2005 4:58 am Post subject:
Re: DVI vs VGA |
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Phil Weldon:
| Quote: | Some LCD displays have an analog input; better results come when digital
display devices receive a digital signal without the unecessary pair of
conversion from digital to analog to digital.
|
Well.... I borrowed a LCD screen with fast refresh and tested with
some games. No matter what anyone says, the movement was smoother
when I used analog VGA then when I tried DVI (my card has both).
Even if the LCD always use 60hz refresh the imaged moved smoother
(like when turning or running in a game) with analog. AND the refresh
rate mattered (better with 85hz then with 60hz). Can anyone explain?
--
Lars-Erik - http://home.chello.no/~larse/ - ICQ 7297605
WinXP, Asus P4PE, 2.53 GHz, Asus V8420 (Ti4200), SB-Live! |
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Andrew
Guest
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| Posted:
Fri Nov 11, 2005 5:00 am Post subject:
Re: DVI vs VGA |
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On Thu, 10 Nov 2005 23:58:15 +0100, Lars-Erik Østerud <.@.> wrote:
| Quote: | Even if the LCD always use 60hz refresh the imaged moved smoother
(like when turning or running in a game) with analog. AND the refresh
rate mattered (better with 85hz then with 60hz). Can anyone explain?
|
You need to use the monitors native resolution and refresh rate for
optimal image quality.
--
Andrew, contact via interpleb.blogspot.com
Help make Usenet a better place: English is read downwards,
please don't top post. Trim replies to quote only relevant text.
Check groups.google.com before asking an obvious question. |
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Phil Weldon
Guest
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| Posted:
Fri Nov 11, 2005 5:43 am Post subject:
Re: DVI vs VGA |
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Suggestion: You have optimized your settings over a long period of game
playing with your analog CRT (I assume), whilst you only used the digital
input LCD monitor for a short time.
And, as Andrew posted, did you set the card to display the native resolution
for the LCD monitor?
Phil Weldon
"Lars-Erik Østerud" <.@.> wrote in message
news:9gQcf.668$zc1.609@amstwist00...
| Phil Weldon:
|
| > Some LCD displays have an analog input; better results come when digital
| > display devices receive a digital signal without the unecessary pair of
| > conversion from digital to analog to digital.
|
| Well.... I borrowed a LCD screen with fast refresh and tested with
| some games. No matter what anyone says, the movement was smoother
| when I used analog VGA then when I tried DVI (my card has both).
|
| Even if the LCD always use 60hz refresh the imaged moved smoother
| (like when turning or running in a game) with analog. AND the refresh
| rate mattered (better with 85hz then with 60hz). Can anyone explain?
| --
| Lars-Erik - http://home.chello.no/~larse/ - ICQ 7297605
| WinXP, Asus P4PE, 2.53 GHz, Asus V8420 (Ti4200), SB-Live! |
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Lars-Erik Østerud
Guest
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| Posted:
Fri Nov 11, 2005 5:46 am Post subject:
Re: DVI vs VGA |
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Andrew:
| Quote: | Even if the LCD always use 60hz refresh the imaged moved smoother
(like when turning or running in a game) with analog. AND the refresh
rate mattered (better with 85hz then with 60hz). Can anyone explain?
You need to use the monitors native resolution and refresh rate for
optimal image quality.
|
Still doesn't explain why movement is better with analog and high hz?
Using native resolution requires one h**l of a video card
--
Lars-Erik - http://home.chello.no/~larse/ - ICQ 7297605 |
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Lars-Erik Østerud
Guest
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| Posted:
Fri Nov 11, 2005 5:48 am Post subject:
Re: DVI vs VGA |
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Phil Weldon:
| Quote: | Suggestion: You have optimized your settings over a long period of game
playing with your analog CRT (I assume), whilst you only used the digital
input LCD monitor for a short time.
|
It stuttered like h**l with DVI and the 50 hz refresh (it can only
display 50 frames pr second, that MUST be more stuttering that 85)
Strange this is that using analog it looked much smoother. If that is
a illution it doesn't matter. It look smoother and is easier to play.
BTW: Why don't they make LCD with higher rate (like 85hz) for gamers?
PS! Also you have the pixel on/off time giving afterglow on red.
--
Lars-Erik - http://home.chello.no/~larse/ - ICQ 7297605 |
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Andrew
Guest
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| Posted:
Fri Nov 11, 2005 5:55 am Post subject:
Re: DVI vs VGA |
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On Fri, 11 Nov 2005 00:48:21 +0100, Lars-Erik Østerud <.@.> wrote:
| Quote: | BTW: Why don't they make LCD with higher rate (like 85hz) for gamers?
|
Because you don't need a higher rate, the image works differently to a
CR image. I used to use 100hz on my CRT, now I use 75 on my LCD and it
looks great.
--
Andrew, contact via interpleb.blogspot.com
Help make Usenet a better place: English is read downwards,
please don't top post. Trim replies to quote only relevant text.
Check groups.google.com before asking an obvious question. |
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Phil Weldon
Guest
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| Posted:
Fri Nov 11, 2005 6:21 am Post subject:
Re: DVI vs VGA |
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You bring what is called an anecdote, a story of one experience by one
person with one set of equipment.
What makes it even more difficult to comment on your experience is that you
gave no information on resolutions, monitors, or content.
Phil Weldon
"Lars-Erik Østerud" <.@.> wrote in message
news:5%Qcf.670$zc1.546@amstwist00...
| Phil Weldon:
|
| > Suggestion: You have optimized your settings over a long period of game
| > playing with your analog CRT (I assume), whilst you only used the
digital
| > input LCD monitor for a short time.
|
| It stuttered like h**l with DVI and the 50 hz refresh (it can only
| display 50 frames pr second, that MUST be more stuttering that 85)
|
| Strange this is that using analog it looked much smoother. If that is
| a illution it doesn't matter. It look smoother and is easier to play.
|
| BTW: Why don't they make LCD with higher rate (like 85hz) for gamers?
|
| PS! Also you have the pixel on/off time giving afterglow on red.
| --
| Lars-Erik - http://home.chello.no/~larse/ - ICQ 7297605 |
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Joe Mama
Guest
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| Posted:
Fri Nov 11, 2005 6:29 am Post subject:
Re: DVI vs VGA |
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Andrew wrote:
| Quote: |
You need to use the monitors native resolution and refresh rate for
optimal image quality.
|
Do LCDs have a *native* refresh rate? Never owned one, but I know CRTs
don't.
Cheers,
-joe.
____________________________________________________
The problem with the youth of today is that
one is no longer part of it. |
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Andrew
Guest
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| Posted:
Fri Nov 11, 2005 6:38 am Post subject:
Re: DVI vs VGA |
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On Fri, 11 Nov 2005 11:29:07 +1100, Joe Mama
<bloodywanker@drugsmakemecool.com> wrote:
| Quote: | You need to use the monitors native resolution and refresh rate for
optimal image quality.
Do LCDs have a *native* refresh rate? Never owned one, but I know CRTs
don't.
|
Yes, which is why I bothered to type what I did.
--
Andrew, contact via interpleb.blogspot.com
Help make Usenet a better place: English is read downwards,
please don't top post. Trim replies to quote only relevant text.
Check groups.google.com before asking an obvious question. |
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Joe Mama
Guest
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| Posted:
Fri Nov 11, 2005 6:54 am Post subject:
Re: DVI vs VGA |
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Andrew wrote:
| Quote: |
Do LCDs have a *native* refresh rate? Never owned one, but I know CRTs
don't.
Yes, which is why I bothered to type what I did.
|
Okay, sheesh. I was just curious. |
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Benjamin Gawert
Guest
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| Posted:
Fri Nov 11, 2005 8:26 am Post subject:
Re: DVI vs VGA |
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Lars-Erik Østerud wrote:
| Quote: | It stuttered like h**l with DVI and the 50 hz refresh (it can only
display 50 frames pr second, that MUST be more stuttering that 85)
Strange this is that using analog it looked much smoother. If that is
a illution it doesn't matter. It look smoother and is easier to play.
|
You probably have vsync turned on so the fps is limited by the refresh
rate. Turn it off in the gfx drivers...
| Quote: | BTW: Why don't they make LCD with higher rate (like 85hz) for gamers?
|
Simply because LCDs don't flicker, and higher refresh rates don't make
sense....
Benjamin |
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Lars-Erik Østerud
Guest
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| Posted:
Fri Nov 11, 2005 7:20 pm Post subject:
Re: DVI vs VGA |
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Joe Mama:
| Quote: | Do LCDs have a *native* refresh rate? Never owned one, but I know CRTs
don't.
|
Yep, 50hz (or is it 60), to low anyway. But that why it's real strange
that using analog input and higher refresh makes movement smoother. It
shouldn't as the display is locked to 50/60hz anyway. So why does it?
Is it that the frames in between each 50 hz (almost 2) gets displayed
partly on top of each other, making the eye think it's smoother?
--
Lars-Erik - http://home.chello.no/~larse/ - ICQ 7297605 |
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