Philips 190S8 Electronic User's Manual page 73

Resolution notification
This monitor is designed for optimal performance at its native resolution, 1280X1024@60Hz. When
the monitor is powered on at a different resolution, an alert is displayed on screen: Use
1280x1024@60Hz for best results.
Display of the native resolution alert can be switched off from Setup in the OSD (On Screen
Display) menu.
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