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Dvi vs VGA

Last response: in Graphics & Displays
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May 13, 2012 7:09:32 PM

Hi guys :D 

My old pc worked fine in cod4 @ 125 fps. (Gfx card: gt240 Nvidia)
I got a new pc but I am still using the old screen (LG 19" 1360x768 LCD input: VGA). My new pc (gfx card : gtx 550 ti from Inno 3D) has horizontal lines on my screen that goes away if I enable v-sync. I don’t understand why it has sync problems since both pc's frame rate on the game is the same why does the one not have those lines.

I bought a new screen (LG 23" 1920x1080 LED input: DVI, VGA) and it still has sync problems when I use VGA. When I pause my cod4 game it goes to the menu where there is a bit transparency so that u can still see whats going on in game. Using the VGA input the image is smooth (but has horizontal lines) and when I switch to DVI input the image in the back looks low quality.

The DVI displays for eg. A glow that you can see the different phases of which the fade exist, like contour lines instead of fading out unnoticeable.

More about : dvi vga

May 13, 2012 7:15:54 PM

oh yeah i am using a DVI cable that we got with a projector
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a c 91 U Graphics card
May 13, 2012 8:35:27 PM

see if the refresh rate is over 60 hertz if yes lower it to 60
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May 13, 2012 8:47:34 PM

ty for reply ,, its already set @ 60 hz . the real ploblem with this is that images don't show up on my screen as good as they did on my old pc , the VGA has lines and the DVI has crap quality.

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a c 91 U Graphics card
May 13, 2012 8:49:06 PM

check your cables between the card and monitor
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May 13, 2012 8:54:09 PM

scout_03 said:
check your cables between the card and monitor

i think the cables are fine. I used fraps to take a screenshot of the game and the quality on the photo was just as crap as it is in realtime when i play the game. i gues fraps captures the signal straight from the card so i dont think its the cables.
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a c 291 U Graphics card
May 13, 2012 9:05:09 PM

It's called 'screen tearing effect'. It happens when graphics card draws more frames per second than the monitor can display, and it draws into screen half done frames. When I got my new PC, on older games I started noticing it. Hell, even on new games that are over 60 fps, even more demanding like Crysis 2 indoor scenes, when viewing around, screen tearing is unbearable. My suggestion: download latest beta drivers:

64 bit - http://www.geforce.co.uk/drivers/results/43891
32 bit - http://www.geforce.co.uk/drivers/results/43909

and in nvidia control panel force adaptive vsync for all applications. That's how I fixed my issue.
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a c 217 U Graphics card
May 13, 2012 9:12:58 PM

Sunius said:
It's called 'screen tearing effect'. It happens when graphics card draws more frames per second than the monitor can display, and it draws into screen half done frames. When I got my new PC, on older games I started noticing it. Hell, even on new games that are over 60 fps, even more demanding like Crysis 2 indoor scenes, when viewing around, screen tearing is unbearable. My suggestion: download latest beta drivers:

64 bit - http://www.geforce.co.uk/drivers/results/43891
32 bit - http://www.geforce.co.uk/drivers/results/43909

and in nvidia control panel force adaptive vsync for all applications. That's how I fixed my issue.


Just so there is no confusion. Screen tearing can happen at any FPS on any refresh rate, but at FPS above your refresh rate, you are guaranteed to get screen tearing. When you do get screen tearing below your refresh rate, it's often not as noticeable.
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May 13, 2012 9:15:27 PM

i would like to fix the DVI issue rather than finding a work around with VGA. VGA works fine now that ive enabled sync :)  BUT i want to figure out if the DVI problem is my card so i can take it back where i bought it.
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a c 291 U Graphics card
May 14, 2012 5:04:15 AM

Oh so it's not just screen tearing, sorry, when I read your topic I was about to go to sleep :D . Anyway, could you post a screenshots of what's going on? That way we can tell if it's graphics card fault.
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a c 78 U Graphics card
May 14, 2012 5:57:03 AM

Just to be on the safe side, you do have the desktop resolution and in game resolution set to whichever panel your usings native resolution right?
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May 14, 2012 1:08:22 PM

yes 1920x1080 on 23"
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May 15, 2012 3:18:37 PM

tnx for any input :)  turns out its my LG monitor that is not high quality , im returning this monitor and never going to buy LG again .... Samsung FTW
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a c 91 U Graphics card
May 15, 2012 4:35:01 PM

a got a 24 inch viewsonic lately with led panel not bad at all with 3 years warranty
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