That screen shouldn't get a value of 83DPI. If you use the default "best" resolution of the Samsung 793s (1280x1024), you should get 96DPI, and if it is forced to 1024x768, you should get 75DPI. 83 splits the difference nicely, but as the monitor should be in one mode or the other, rather than half-way between, this isn't ideal.
That screen shouldn't get a value of 83DPI. If you use the default "best" resolution of the Samsung 793s (1280x1024), you should get 96DPI, and if it is forced to 1024x768, you should get 75DPI. 83 splits the difference nicely, but as the monitor should be in one mode or the other, rather than half-way between, this isn't ideal.