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Poor Nvidia TV Output

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9th March 2006 17:43  #1

Jonny "Me You" Senior Member Join Date: March 2004 Location: Canada Posts: 2,863
Poor Nvidia TV Output
So back in late november I went and bought a shiny new Dell with an NVidia 6800 graphics card and figure it would be neat to hook up to my TV so I could watch stuff full screen that way, or edit my home videos in a more professional way, etc..

I finally got the cables the other day and guess what?

The graphics card is emitting a huge rolling bar of distortion making the image from it nearly unwatchable. It's hooked via SVIDEO directly into the TV (a 27 inch sony wega) so it's not a macrovision thing.

At first I thought it was the cable, but then I plugged it into my digital cable terminal and it worked perfectly.

Anyone else have a similar problem? how did you fix it? I can't believe that NVIDIA's display is really that bad.

10th March 2006 8:40  #2

Worst Nightmare Senior Member Join Date: July 2002 Location: Australia Posts: 6,706 Send a message via AIM to Worst Nightmare Send a message via ICQ to Worst Nightmare Send a message via MSN to Worst Nightmare Send a message via Yahoo to Worst Nightmare Send a message via Google to Worst Nightmare
My Toshiba laptop has a Nvidia Go5700 and it works fine - mind you it is a bit older. Does your tv have different modes? i.e. PAL, SECAM, etc - maybe try changing this but it is a long shot. I assume you have chenged refresh rates, etc on the controll panel of the graphics card to match the tv?

10th March 2006 9:57  #3

rob murray Member Join Date: November 2004 Location: United States Posts: 477
Its your refresh rate homie. A normal TV cant hadle that amount of refreshing. Keep lowering it about 5 points at a time till your problems go bye bye. You probably have it set somewhere around 85 right now.

10th March 2006 14:31  #4

Jonny "Me You" Senior Member Join Date: March 2004 Location: Canada Posts: 2,863
I had a thught later on that it might be the refresh rate too, but there isn't anything in the drivers controls that lets you change it. Currently I have the thing set on North American NTSC and 1024 x 768 resolution. I'll play with the res and see if that helps.

Thankfully, the drivers split the displays like I'm using a second monitor, so nothing I do affects my main LCD.

10th March 2006 15:19  #5

Jonny "Me You" Senior Member Join Date: March 2004 Location: Canada Posts: 2,863
Here's a little update. I found where to change the timings and refresh rates, but none of the custom modes made much of a difference. I also downloaded this little thingy called TV tool, but it didn't help either.

11th March 2006 8:40  #6

rob murray Member Join Date: November 2004 Location: United States Posts: 477
you might want to lower the the resolution too.

18th March 2006 5:27  #7

Keith Member Join Date: June 2005 Location: United States Posts: 221
Poor Nvidia TV Output
Jonny "Me You" wrote: So back in late november I went and bought a shiny new Dell with an NVidia 6800 graphics card and figure it would be neat to hook up to my TV so I could watch stuff full screen that way, or edit my home videos in a more professional way, etc..

I finally got the cables the other day and guess what?

The graphics card is emitting a huge rolling bar of distortion making the image from it nearly unwatchable. It's hooked via SVIDEO directly into the TV (a 27 inch sony wega) so it's not a macrovision thing.

At first I thought it was the cable, but then I plugged it into my digital cable terminal and it worked perfectly.

Anyone else have a similar problem? how did you fix it? I can't believe that NVIDIA's display is really that bad.


     My first suggestion, and the easiest, would be to update your drivers.  If this was already suggested, I apologize.

I think this may be the problem, especially if you have a long s-video cable.  Those type of cables are very lossy at lengths of over 8-10 ft or so, because its carrying a video signal.  When using s-video cables you need a high quality cable.  I know this because I had the exact same problem as you, many years ago with my first computer DVD player.  I bought about a standard s-video 20ft cable at a computer show and had the bars on my tv screen like you did.  After pulling some hair out I went and bought a Monster cable, which was very costly, and the problem was gone. It's mostly because of the shielding on the cable.  Standard quality cables (s-video) have poor shielding.

Acoustic Research, which I think is still available at retail stores, or Blue Jeans cable on the internet.  Both would be a better buy than Monster Cable  I think Radio Shack carries Monster Cables now.  If it doesn't work you can always return.

18th March 2006 18:06  #8

Jonny "Me You" Senior Member Join Date: March 2004 Location: Canada Posts: 2,863
I was thinking it was the cables, because I was using a 20 footer like you were, but when switching to a shorter one - I think it was 6 foot, the problem was still there. Although, maybe a better shielded one is the answer. I may decide to try it out.

21st March 2006 2:45  #9

Keith Member Join Date: June 2005 Location: United States Posts: 221
I don't know the exact length where problems begin.  Like said, the problem is shielding.  Bad shielding bleeds, and interference from outside electrial sources, in.

21st March 2006 13:43  #10

Jonny "Me You" Senior Member Join Date: March 2004 Location: Canada Posts: 2,863
I think the card must be underpowered too as compared to stand-alone devices, cause like I said above, I did try the cable on my digital terminal and it worked perfectly.

Dag nabbit.

29th March 2006 7:45  #11

Keith Member Join Date: June 2005 Location: United States Posts: 221
I've seen bad cards, but being underpowered is not likely for a mass produced video card.  Check the min. card requirements to make sure your system is compatible.

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