Is running my monitor at a res it doesnt support bad?

[johndenver]

I have a samsung lcd that can only support 1280x1040

Therefore I can only 4 table unless I overlap tables

However, I can force it to be higher resolutions where I can 9 table, but the screen doesnt look normal ( things stretched or compressed and cant see the whole desktop, taskbar half off screen ).

Also, the monitor puts up a warning saying that this mode is not supported, I have to close the warning by pushing a button on the physical monitor.

Is running at unsupported resolutions going to really destroy my monitor or is my monitor just a nit?