The Macintosh Display Card 4*8 and Macintosh Display Card 8*24 show the most improvement because they support slave NuBus block transfers and many other display cards do not.
Acceleration for frame buffers other than the one resident on the Macintosh Display Card 8*24 GC would not be as dramatic because of the greater amount of NuBus traffic required.
Only one Macintosh Display Card 8*24 GC may be used for graphics acceleration in a system. If two cards are present, one must have its acceleration function disabled.