I purchased some games that can use the iMacs hardware graphics acceleration, but they behave as if 3D acceleration is not available. Can you explain?
The iMac ships with 2 megabytes of VRAM, a configuration that allows 3D acceleration only at the lowest resolution, 640 x 480. Either reduce the resolution or install more VRAM (SGRAM). To determine whether the iMac has more than 2 MB of VRAM installed, open the Monitors & Sound control panel and select the 1024 x 768 resolution shown. If “Millions” is an option provided in the “Color Depth” section of the control panel, the VRAM has been upgraded. Other reasons why 3D acceleration may not be available: The program may have installed extensions or other software of its own that did not load prior to running the program. Check with the program’s documentation or manufacturer to confirm what software is required and where it should be installed. When the program was installed, it may have replaced the iMac’s existing ATI extensions with older versions.
