Toonboom storyboard's slowness

Hi every body,I’ve just brought the latest version of toonboom storyboard. I find it works well in the machine of Intel(R) Core™ i7 CPU 920 @ 2.67GHz (8 CPUs), ~2.8GHz, with graphic card ATI Radeon HD 5800 Series. But it running really slow when grabbing the timeline in the machine of AMD Athlon™ II X3 435 Processor (3 CPUs), ~2.9GHz, with graphic card ATI Radeon HD 4200. Other hardware config are similar. I compare by opening the same scene. The preference should be the same. I wonder if intel and amd cpu can make such difference because I’m already using very high grade machines. Please advice. Thanks.