DVI-I or DP for Analog VGA output

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Marcuser

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Hello there, I've done with my lcd display yesterday, and now want to use my old curved CRT with my GTX 760.

As far as I know and just researched, only the DVI-I and DisplayPort outputs are compatibe for VGA's analog signal, and GTX 760 have them both. So I'm going to buy a converter/adapter for one of those, but I have no idea that which port would give better/most authentic output quality for my CRT, or is there any particular things I should consider for cherrypicking...

Can you guys help me out please?
 
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mjslakeridge
Glad you got it fixed, but CRT monitors contain some pretty high voltages, even if turned off and unplugged (unless you know how to safely discharge the capacitors), so I would suggest caution.
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Marcuser

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no, sir, what I'm saying is that my GPU doesn't have a VGA output. And I only have a CRT monitor with VGA plug.

My GTX760 has 2 outputs which are compatible with giving out Analog display.

This is why I'm asking that which one should I use an adapter for. DVI-I to VGA or DisplayPort to VGA? I'm asking about which port on the GPU would provide the most natural display for the monitor, through an adapter.
 
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mjslakeridge

mjslakeridge

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If you are sure that your card indeed has a DVI-I and not a DVI-D, then you just need a DVI-I to VGA adapter. (The "I" stands for integrated, meaning it outputs both a digital and analog signal). If you for some reason want to use the Display Port, you will need an ACTIVE converter, as DP only outputs a digital signal.
 
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Marcuser

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Alright, it seems that the DVI-I output is true to the VGA native. Also the manual of the gpu says that I should use DVI-I to VGA adapter.

Now I can use my crt on this but there's still a problem, the gpu seems to override the monitor's very own settings(which you do with OSD menu, horizontal-vertical position, noire etc.) they don't work and my screen looks extremely distorted. Any suggestions? Nvidia control panel didn't help. It shows my monitor's brand and model, so I suppose it's overriding it but I couldn't disable the feature.
 
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mjslakeridge

mjslakeridge

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If you can figure out the native resolution for the CRT monitor, you may be able to select that in the Nvidia control panel. Is there any info about the native resolution in the OSD? Perhaps look for a manual for the monitor online. Probably not too many CRT monitors still in use today, I think I took my last one to the recycling center about 10 years ago.
 
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Marcuser

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Well, monitor's a Philips 107e4 and the native resolution is 1280x1024, which was the selected one. It was displaying pretty well at beginning but after a few minutes when I tried to move the monitor, it crippled some electricity probably caused by cable, so just right after that it started to display a distorted concave image, like a buttoned pillow. I'm still trying to find a solution. So far Nvidia control panel and the analogue osd of monitor itself is ineffective.

Gauss reset doesn't work.
Nvidia control panel either doesn't show any option about resizing or over/underscan. interesting.
The display still was distorted when I restarted the pc after POST state, so I don't think it's caused by software. or at least maybe nvidia cp stored a force setting on gpu memory.
 
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Marcuser

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Alright I found the problem after finally taking a peek into the crt.
There was a short circuit between one of the conductors on main PCB and the "vertical signal cable", which is the one wrapped behind below the screen.

For future visitors, shut down the monitor and unplug it, just open the case (then plug it in again and turn on) and slowly and very gently bend the face front and back, just like tooth(yes, while it's turned on. use a glove or hold the front plastic cover). If you hear some electrical ticks or sudden corrections of image, fine tune the position, keep sparking it so you can find the shortcut location visually. Mine was like that, and probably it was the weight of the screen itself pushing the weak plastic panel down, and pressuring to the motherboard. I fixed it with squeezing a wooden pick between the cable and the component.
 
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