Originally posted by: Starbuck1975
Here is where I get confused, and hence my hang-up on 1:1 pixel mapping.
I know that my GPU probably can't handle a 24", but perhaps a mistake on my part to choose a lower quality LCD based on a component that I will have to upgrade in the next year regardless...and my next GPU will be able to handle 24" of LCD goodness.
But, for the time being, I thought if you run a 24" LCD at lower than native resolution, you can encounter a variety of scaling issues?
You are thinking right: Why, because of your current videocard, compromise on the only part of your system you actually see and are going to keep for a long time?
1:1 pixel mapping is mostly important for non-PC sources such as game console or BluRay player. Yes, you might have problems with non-widescreen games, but you will have these problems wether you use native resolution or scale to 1280x800 for example. Scaling at lower resolutions and 1:1 pixel mapping are two different things.
You have to make sure that the 1920x1200 monitor you get can scale at lower resolutions. I have confirmed on the Dell Forums and Hardforums that the Dell 2407 can scale to 1680x1050 and 1280x800. 1440x900 seems problematic though.
If the monitor can't do a particular resolution it by itself, you will have to use internal videocard scaling available with NVidia videocards. Basically, the lower-resz, scaling is done internally and a 1920x1200 signal is sent to the monitor. The monitor is displaying 1920x1200, but you are seeing 1280x800 on-screen, and for a game, the GPU load is related to 1280x800.
Also, the lower-rez, scaling won't look too bad on a 24-inch monitor because of the smaller dot pitch compared to a 22-inch monitor. In that respect, 1280x800 is a perfect 3:2 ratio with 1920x1200, so there are less "fractional pixels" involved than in scaling from 1680x1050 to 1280x800
Finally, a compelling reason to buy 24-inch monitors is the fact that 1920x1200 is the lowest resolution that can display a 1920x1080 1080i HD picture without scaling.