Not sure if there is a performance increase but the acompanying Control Panel adds Brightness and Contrast which makes the screen much more viewable. The new drivers are WHQL also.
Those who don't know. WinXP and Win2K on the 8887 with ATI M9 128
1. Uninstall the old ATI Conrol Panel and ATI Drivers. Don't reboot until you uninstall both. Not sure if matters what order you uninstall.
2. After you reboot you should have the 800X640 resolution. Now install the Drivers first. You will get a *.inf not found error or something like that. Just exit the install. You will need to install the drivers from Device Manager. When you started the install it puts the *.inf file in this directory unless you changed it.
Form Device Manager, Choose Display adaptors | Update Driver | Install from a list... | Don't searh... | Have Disk and browse to the above directory.
CX_09437.inf for WinXP
C2_09437.inf for Win2K
(Choose RADEON 9000 SERIES)
Now you can install the Controll Panel which should go off without a hitch. Allow to reboot and you should have the native resolution of 1600 X 1200.