I have a Viewsonic A90f+ 19" CRT that I want to run in 1600x1200 in Windows. I currently have the refresh rate set to 70 hertz, but the specs page on Viewsonic's website states it can do a maximum of 68hz @1600x1200. Will my monitor be damaged over time if I leave the refresh rate at 70hz with this resolution? I currently have it set to that, it appears to be fine, but I don't want to take a chance with leaving it that way and damaging my monitor.