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This article is from the comp.sys.ibm.pc.hardware.video Frequently Asked Questions, by Michael Scott with numerous contributions by others. (v1.0).

10 What pixel addressabilities are best for my monitor?

There is no right answer to this question, because it is subjective. However, my recommendations are:

                                Monitor Size
                        Aspect  14"     15"     17"     20"
                        Ratio
Screen
Addressabilities


640x480                 4:3     O       O       G       G
800x600                 4:3     A       O       O       G
1024x768                4:3     NR      A       O       O
1280x960                4:3     NR      NR      A       O
1280x1024               5:4     NR      NR      A       O
1600x1200               4:3     --      --      NR      A
1600x1280               5:4     --      --      NR      A

O - Optimal
G - Pixels are large enough to appear grainy
A - Acceptable
NR - Not Recommended - unless you like looking through a magnifying glass

Keep in mind that the aspect ratio can be important. Standard televisions and computer monitors are designed to work with a 4:3 aspect ratio. If you use a 5:4 aspect ratio on a monitor with a 4:3, your screen image will be compressed vertically, making circles appear as ellipses. The error associated with using a pixel addressability aspect ratio of 5:4 with a monitor os 4:3 is about 6%.

 

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