GETTING MOMITOR SET TO 800X600

https://forums.windrivers.com/
Hi there, i am in need of help
I recently picked up a Ogivar 19" monitor.
it is kinda old, but works well.
I can get it to run in 640x480@60hz, but can't get it to run properly in 800x600
now, mabey it can't do it, i dont know, I can't find any information on it. got no driver, so cant screw w/refresh rate that way.
is there a simple way to find out what this monitor will do, and what refresh rate it needs to do it, AND, a way to set up a driver to do?

any programs out there that can accomplish this, that arnt over complicated?

( i believe in the k.i.s.s. princaple)

any and all info welcome, thanks bunches in advance.