ATI Technologies RADEON X1550 SERIES - Manual (Page 54)

46 Display Options
Clicking Discard applies to all features of an aspect, not just the feature in
the current view.
Display Options
The Display Options aspect gives you additional control to optimize
performance of OpenGL® and Direct 3D® applications.
Use 3D Refresh Rate Override to set a refresh rate of your choice when a
full-screen application or game has a default refresh rate that is lower than
optimal.
Choose one of the Display Detection Options to prevent screen flicker
when detecting a display.
If you are using an older TV or one that has non-standard inputs that may
not be automatically detected, use Force TV Detection. When a TV is
detected using this method, it appears in the Displays Manager aspect and
can be configured as required. However, some features that rely on
automatic detection, such as extended desktop, will not be supported.