The Creator accelerator does not have hardware for copying pixels within the frame buffer. Pixels are copied by reading the pixels into CPU registers and then writing them back to the frame buffer. Thus, pixel copies within the frame buffer are CPU-intensive. When the system is under heavy load, the performance of window dragging operations may suffer. For example, the ShowMe Whiteboard "Snap Region" image drag operation may slow down while an active SunVideo stream is being rendered. This effect does not occur on a TurboGX accelerator, which has pixel copy hardware.