Your system should be capable of running CC3 smoothly.
However there are many things could affect CC performance, such as Real-time Render Options, Max Texture Size. Sometimes an outdated driver could also cause this kind of issue.
I have helped you submit this issue to our online support system. The support team will contact you via email and will help you to find the solution.
You can also check the “Support Ticket” section on your account page as per following link.
We apologize for any inconvenience this may caused and look forward to getting your issue resolved.