LCD and scaling up

Custom / CUSTOM
January 16, 2009 at 10:24:39
Specs: Windows XP, athlon fx 4400/ 2gb
I bought an lcd that's 1600 1040 or something close to that...Now for some reason I can make it go all the way up to 1920 1200. This can only be achieved with the vga cable. When I plug in through the dvi one it goes that high but not all at once, it does that thing where you move to the edge the rest is revealed.

So I want 1920 x 1200 but all at once with the dvi cable is this possible, the screens native resolution is much lower than that, but it can do it with the vga just blurry and with ghosts

Is there any way to scale to higher resolutions wit the dvi cable, i've looked at all the options in the nvidia control panel and no luck so far...

Truth can become lie, but if lies become truth we're in trouble.

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January 16, 2009 at 10:59:27
LCD displays all have a native resolution. That is the BEST resolution to use. Going higher or lower will degrade the image.

What model and size is the LCD display?

Your display probably has a native resolution of 1680x1050. Is it a 22" wide screen?

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January 16, 2009 at 11:25:52
To expand on what OtheHill said; A CRT monitor has an infinitely variable pixel size limited only by the maximum scan frequencies the monitor can handle. An LCD has a fixed pixel size determined by the number of thin film transistors built into the screen.

Consequently, resolutions outside the native resolution can only be achieved by extrapolation. Some LCDs are better at extrapolation than others. Some extrapolated resolutions look better in relation to the native resolution than others.

So it appears your monitor cannot do extrapolation when in DVI mode and why should it. Why use a high quality digital video system then degrade it with extrapolation.

In fact I would be surprised if any LCD monitor will do extrapolation while in DVI mode and is probably more difficult to do, it defeats the whole object of DVI. Extrapolating an analogue signal during the analogue to digital conversion stage is relatively easy.


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