Tweaking SimCity 4 on a Newer ATI Card
How to update Video Cards.sgr
- Display Control Panel -> Settings -> Advanced -> Adapter
- Take note of the 0x number in Chip Type
- Open Video Cards.sgr in the game's program folder and add a matching entry for your video card. If you can't save the file, right-click -> Properties on the file and uncheck "Read Only".
How to update Graphics Rules.sgr
- Open Graphics Rules.sgr in the game's program folder and search for Radeon.
- You may need to add stringMatch cardIdentity "*PRO*" below partialRule "SlowSubrectDepthCopy" -any
- Some people report good results by setting property noPartialBackingStoreCopies to false instead of true.
- I personally have found improved performance by setting property dirtyRectMergeFrames to 32 instead of 8.
- If you can't save the file, right-click -> Properties on the file and uncheck "Read Only".
Suggested Apps\SimCity 4.ini
[Directories]
Data=..
PlugIn=..\Plugins
[Graphics Drivers]
OpenGL =SimGLRef.dll, C4554841
Software=SimGLSoft.dll,7ACA35C6
D3D7 =SimGLDx7.dll, BADB6906
[Current Graphics Driver]
Driver = C4554841 ;OpenGL Hardware
;Driver = 7ACA35C6 ;GRPoly Software
;Driver = BADB6906 ;DX7 Hardware
Official patch and driver sites
References