freeze in sculpt mode

every a few minutes sculpting, i can’t rotate the view. i have to wait for a few seconds or click other window to reactive rotation. i use wacom bamboo tablet, blender 2.62 and ati radeon.

AFIK, sculpting and texture painting does not make use of GPU. The stroking produces a massive amount of Threads, that need to be switched. It would be helpful to know on what kind of machine you are working, to determine, if that is the case here. Of course, the higher the resolution the lower the performance.

thanks. i use i5 760 and 4G ram.