Supported but non-Exposed Modes.
The Radeon display driver is built to support a number of display modes that are not enabled in the driver by default. The reasons for this are many fold and I won’t go into the details.
At any rate, it is possible to enable these modes by adding registry keys to turn them on, IF your monitor reports that it supports these modes.
Here are the modes
that are built in but not enabled
704x480 @ 60 Hz
720x400 @ 70, 75, 85, 160, 200 Hz
720x480 @ 59.94, 60, 72, 75, 85, 90, 100 Hz
720x576 @ 59.94, 60, 75, 100 Hz
848x480 @ 60, 75, 88 Hz
856x480 @ 60 Hz
864x480 @ 60, 75 Hz
960x720 @ 60 Hz
1024x600 @ 60 Hz
1072x600 @ 60 Hz
1280x720 @ 59.94, 60, 75, 85 Hz
1280x768 @ 56, 60, 75, 85 Hz
1280x800 @ 60, 85, 100, 160, 200 Hz
1280x960 @ 60, 70, 72, 75, 85, 100, 120,
160, 200 Hz
1360x768 @ 62 Hz
1400x1050 @ 60 Hz
1536x864 @ 60, 85, 100, 120, 160 Hz
1600x900 @ 60, 75, 85, 100, 120, 160 Hz
1600x1000 @ 60, 75, 85, 100, 120, 160 Hz
1600x1024 @ 76 Hz
1600x1280 @ 86.52 Hz
1856x1392 @ 60, 72, 75, 90, 100 Hz
2048x1152 @ 60, 75, 85, 100 Hz
2048x1280 @ 60, 70, 75, 85, 90, 100 Hz
Registry Key Locations
Windows 98, Windows ME, WinNT 4.0, and Win2000 use common registry values to control mode enumeration and mode behavior. These common registry values reside in different registry key locations specific to each operating system, and product family.
WinNT 4.0 and Win2000 place registry keys in the location:
\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servi ces\ati2mtxx\DeviceN
Win98 and WinME place registry keys in the location
\HKEY_LOCAL_MACHINE\Software\ATI Technologies\Driver\NNNN\DAL
In the \DAL folder, edit the key;
DALNonStandardModesBCD
The format of this key is a number of entries that enable the non-standard modes above. The data is formatted as follows
HH HH VV VV CC CC RR RR
where
* HH HH represents horizontal resolution
* VV VV represents vertical resolution
* CC CC represents color depth
* RR RR represents refresh rate
for example, to enable 1920x1080@70Hz: DALNonStandardModesBCD 19 20 10 80 00 00 00 70. The value of 00 00 indicates a wild card. In this case CC CC = 00 00 represents all color depths.