When running one of the Direct X SDK applications in pivot portrait mode, setting the resolution to 1600x1200 then changing full screen mode, the resolution will change to 1200x1920.

How to recreate the problem:

1. Install the DirectX 9.0b SDK application, DirectX Summer 2003 update and patch dx90update_manged.
2. Right-click on the desktop, click ATI CATALYST(tm) Control Center, click View tab, then click Advanced View.
3. Click Graphics Settings, then click Display Manager.
4. Change desktop area resolution to 1600x1200, select refresh rate to 85Hz, then select Rotation to Left (90 deg counter-clock wise), then click OK.
5. Run one of the applications.
6. Maximize the window to full screen by pressing ALT and Enter simultaneously.
7. Press the F2 key to view the Direct3D Settings window. The resolution is changed to 1200x1920 instead of 1600x1200 and the refresh rate supports to 60Hz (maximum) instead of 85Hz
8. Set resolution to 1200x1600, the refresh rate just supports to 70Hz (maximum).

Any of the following ThinkCentre systems running Microsoft Windows 2000 or XP, configured with a Display Data Channel (DDC) monitor and either a 64MB ATI X300 SE, 64MB ATI X300 Pro, 128MB ATI X600 Pro, 128MB ATI X300 SE, or 128MB ATI X700 Pro PCIe video adapter:

• ThinkCentre A51 (type 8122, 8123, 8124, 8129, 8131, 8132, 8133, 8134, 8135, 8136, 8137, 8138, 9212)
• ThinkCentre A52 (type 8287, 8296, 8327, 8340, 8343, 8381)
• ThinkCentre M51e (type 9213)
• ThinkCentre M52 (type 8099, 8110, 8111, 8112, 8113, 8114, 8115, 8116, 8211, 8212, 8213, 8214, 8215, 9210, 9211)
• ThinkCentre M52e (type 8299)

This is a current video adapter limitation. No hardware should be replaced for this issue.