Topic Title: D-Sub+DVI = full hd?
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Created On: 05/11/2013 09:00 AM
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 05/11/2013 09:00 AM
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pepegrillo
Peon

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My video card has DVI (and 1 hdmi that im already using with another monitor) and the monitor is full hd and has a D-sub connector.

Can I reach FULL HD (1920*1080) with a DVI adapter plugged to a D-Sub connector? 

 05/11/2013 10:32 AM
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black_zion
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You could, but analog VGA has subpar image quality compared to digital DVI.

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 05/11/2013 12:11 PM
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pepegrillo
Peon

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TBH, I'm SUPER noob, can you explain that plz?

 05/11/2013 05:17 PM
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Mime
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Possible... Yes.

Good idea... maybe not.  Converting from digital to analog often carries with it some signal loss...  in the case of video can mean fuzzy, blurry images that just aren't as sharp as the original.  It might be worth it just to get a dvi cable if you don't have one and skip the dsub altogether.

If the display has only a vga connector, then you're stuck with it.



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 05/12/2013 01:58 AM
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Dinwiddie
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If the quesiton is will the D-sub transmit 1920X1080 res on a 24" monitor, then yes as this is considered HD.

I have my Intel HD4000 integrated graphics connected via a D-sub cable to the same 1920X1080 monitor as my AMD card using DVI and can't really see any appreciable difference on those occasions that I use the HD4000.

Any difference there is would be a very slightly less sharp text. To me it's one of those situations where in 'real world' it  is not the problem that measurements with tools/software lead us to believe. Having said that I'm not eagle eye either.

I've also used a D-sub adapter on the DVI cable connected via my AMD card to the VGA input on the monitor and still see no real difference. I was using the VGA input with Skyrim for a while when troubleshooting muddy washed out texture shaders in some cave areas in the game when using the DVI (BenQ 120Hz monitor). As the VGA input displayed the textures correctly I came to the conclusion (maybe incorrect) there is something in the AMD drivers that caused this problem as my Nvidia machine did not have the same issue on this monitor using DVI either. Ends up the textures looked better with the brightness turned up almost full in the game settings. Installing the ENB mod has helped even more.

 

.



Edited: 05/12/2013 at 02:12 AM by Dinwiddie
 05/12/2013 08:49 PM
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Thanny
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An analogy signal going to an analog display can give you a fuzzy image.  An analog signal to a digital display cannot.  A poor quality analog signal would either not show at all, or show with random corruption, which wouldn't look anything like what the word "fuzzy" describes.

A normal VGA cable under ten feet long or so will not have such a problem.

The only difference you might see between VGA and DVD-D is lower contrast. 

Finally, make sure that the port is DVI-I and not DVI-D.  The former is either digital or analog, while the latter is digital only.  Compare the appearance with the pictures you see here to check.

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