Topic: DVI and VGA

[E_Look]

As some of you may know, I have just replaced my ailing ATI Radeon 9700 Pro 128 MB with the Sapphire Radeon HD 2600 XT 512 MB.

Now, the card itself is fine, performs well.  So a light bulb clicked on and I said, "Why not get a DVI-1 cable and see if the picture isn't even nicer than with the VGA connection?"

So I ordered one, waited with bated breath and it came today.  So I took off the VGA cable and hooked up the monitor to the graphics card with the DVI cable...

... So I see the cute opening screen hardwired on by the mobo company (MSI), but during the POST and Windows loading screens during boot up, the video goes crazy, blinking and different sections of the picture flashing where they shouldn't be.


But upon finishing boot up, the picture is stable again.

So I test this by shutting down and rebooting a few times, and this repeats itself, and once, even the opening Windows menu screen (where all the user names are listed) was going crazy too (though only once).


Does anyone have any idea why this goes on... and what can be done about it?

Thanks, guys.

[FCM_SFHQ_XC]

Are you using a moniter that is only VGA native or are you using an adaptor for the VGA to DVI connection?
My video card for example only has DVI ports, so I had to use a DVI to VGA adaptor to hook up my VGA moniter to it. I can say that so far I really haven't noticed much of a difference running from my older graphics card VGA port then with using the DVI port with the VGA adaptor.

[Pestalence_XC]

Are you using a moniter that is only VGA native or are you using an adaptor for the VGA to DVI connection?
My video card for example only has DVI ports, so I had to use a DVI to VGA adaptor to hook up my VGA moniter to it. I can say that so far I really haven't noticed much of a difference running from my older graphics card VGA port then with using the DVI port with the VGA adaptor.

The reason you are not seeing anything different is because your monitor is analogue. Your display card is designed to put out a Digital signal thru the DVI cable, but you are using an adapter and connecting to the Monitor's analogue input, so you will not see a difference, If you have a monitor that has a DVI plug, use the DVI and your picture will be much sharper and vibrant and clearer since you will get a true digital reception.  DVI is Digital Video Interface, AVG is Analogue Video Graphic. It doesn't matter what your Vid Card is set for (not including AVG or DVI settings, but performace settings), all your monitor will see is the analogue version of the signal if connected by AVG cable.

[Pestalence_XC]

As some of you may know, I have just replaced my ailing ATI Radeon 9700 Pro 128 MB with the Sapphire Radeon HD 2600 XT 512 MB.

Now, the card itself is fine, performs well. So a light bulb clicked on and I said, "Why not get a DVI-1 cable and see if the picture isn't even nicer than with the VGA connection?"

So I ordered one, waited with bated breath and it came today. So I took off the VGA cable and hooked up the monitor to the graphics card with the DVI cable...

... So I see the cute opening screen hardwired on by the mobo company (MSI), but during the POST and Windows loading screens during boot up, the video goes crazy, blinking and different sections of the picture flashing where they shouldn't be.


But upon finishing boot up, the picture is stable again.

So I test this by shutting down and rebooting a few times, and this repeats itself, and once, even the opening Windows menu screen (where all the user names are listed) was going crazy too (though only once).


Does anyone have any idea why this goes on... and what can be done about it?

Thanks, guys.

go into your Video Card settings.. there should be a place for connection type and when you first connected your Card and loaded drivers it auto configured for VGA, You will need to manually switch it to Digital - DVI.

Click OK and restart your system with the DVI cable in place.. Video should work properly..

Alternative Method :

Uninstall the catalist drivers, restart system, reinstall the catalist drivers .. card should auto set for DVI..

Just make sure your monitor is DVI compliant and double check for the proper screen resolution..

Some monitors have different resolution settings depending if it is AVG or DVI connected.

I once had a View Sonic that got 1800x1600 at 70Hz AVG connection, but the max under DVI was 1280x1024 at 70Hz.

You may want to check your Monitor specifications.

[E_Look]

Nah, it can't be the monitor, as everything stablilzes beautifully as soon as the blue "welcome" screen with all the users' names on it appears.

According to their (ATI/AMD's) techs, it isn't the hardware on the card, either because it doesn't happen during actual POST, only at the black "Windows XP" loading screen (the one with the dots moving from left to right on the bottom, sort of like below Capt. Kirk's original U.S.S. Enterprise's bridge viewscreen).

They say that it's a driver issue, but none of their newest drivers fix the problem.  They also say it may be the motherboard's chipset drivers, which I updated, too... to no avail.

I think it's ATI's drivers.  I keep watch for a newer version soon, as the ones I downloaded were dated less than a week ago.

I'll get back to them and see what else they think it might be.

Oh, the monitor, though I think it has nothing to do with this, is the X2Gen 22" LCD flatscreen monitor.

[chen2x18]

I saw that the video goes crazy, blinking and different sections of the picture flashing where they shouldn't be.


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