View Full Version : Problems with DVI

08-09-03, 12:20 PM
My first post here :) *waves to vampireuk*

Here's the problem:

I have a GeForce FX 5200 Ultra reference card which has the regular VGA-out port, svideo-out and DVI. My monitor, a Samsung SyncMaster 171P (http://www.samsungusa.com/cgi-bin/nabc/product/b2c_product_detail.jsp?eUser=&prod_id=171P-Silver) has dual input, meaning I can hook up one computer through analog RGB and one through the digital DVI input. So I did that. I have my server connected through RGB and my workstation through DVI. The problem is that in the monitor's native resolution 1280x1024 (DVI) the screen flickers and the image gets distorted, it's only noticeable when reading light text on dark or black backgrounds, like when viewing Emulation64.com. Other than that, the picture is crystal clear. I've not noticed this in lower resolutions or when using RGB. The funny thing is, when I use Pivot in the resolution 1024x1280 (DVI again, RBG works perfectly in all resolutions) the picture works perfectly. Would have expected it to have the same problems.

I think it could be that either the monitor is damaged (this is the first time I'm using DVI), the graphics card is damaged or they're simply not compatible:

* I've tested the graphics card in both my server and my workstation - same problem in both.
My workstation uses Win XP Pro SP1 and the server uses Windows Server 2003 Standard.

* I've tried both official and unoffical Detonators.

* I've tried uninstalling the Samsung drivers and noticed the same problem without them installed.

* I've updated VIA 4in1 and motherboard BIOS.

The monitor has its DVI cable attached to it, it's built in, so I can't replace it. I've not tested with another graphics card that has DVI simply because I don't own one or know someone who has one. Here's my setup more detailed if someone think they can help:

OS: WinXP Professional 5.1 Service Pack 1 (Build #2600)
CPU: AMD Athlon XP 1800+, 1.53 GHz
Video: SyncMaster 171p/ 175p/ 170p, MagicSyncMaster CX175BD(Digital)
Graphics card: nVidia GeForce FX 5200 Ultra (1280x1024x32bpp 60Hz)
Motherboard: MS-6380 (K7T266 Pro2-RU, K7T266 Pro2) with BIOS 3.70
Sound: SB Live! 1024
Memory: 512MB

VIA Chipset Drivers 4.46
Detonators 44.03
DirectX 9.0b

Someone send me a card with DVI so I can test it ;)

08-12-03, 02:13 PM
Hi there,

I have kind of a similar problem with an 5600 Ultra from Gainward and a Hyundai/ImageQuest Q17 TFT: The DVI works fine until 1024x768 but doesn't work in the native resolution. Neither updating to (unofficial) drivers nor updating the bios worked.

Hyundai told me that this just happens because many vendors don't test DVI to extensively and that the DVI standards are often violated. They are testing the card right now, but you might have to return it because the DVI out is simply incompatible :-(

If anyone knows a better solution, please let me know.

08-12-03, 03:02 PM
So I'm not the only one with the problem. In my case, I can't return the card since it's a referernce card from nVidia. Oh well, I'll stick with analogue then. :)

03-17-04, 12:03 AM
I have a Ti4200. I have read a lot about awful DVI output (because the problem happens with my card also). The one solution (up to and including GF3 Ti500's) was to remove remove some capacitors that are part of a low pass filter close to the DVI connector. The low pass filter is for FCC compliance. Nvidia won't have any part of it, but don't come up with a solution either (it's a hardware problem, not a software problem). I have two monitors. Both work fantastic with the analog connection. I have a small dvi to vga adaptor (not a cable). Neither work well with the DVI output. One is a 17" Sony (analogue only monitor), the other is a 17" Samsung Syncmaster 172N panel (also analogue only). The official word from the Nvidia people will be "oh no, don't snip the capacitors, your warranty will go away, and and and bad things could happen". And bad things *could* happen. But Nvidia will be remarkably silent about a solution too. The low pass filter kills off higher frequencies needed for clear high resolution video.