Problem with playback preview in DaVinci

Hello, everybody.

I have a problem with DaVinci preview playback: even in edit mode video plays by 10-20 frames sequences and stops. Plays and stops again.

My hardware is laptop intel i7 4 core (Q3610), 16 gb ram, gtx 670, SSD drive.
Software - win7x64, cuda 6.5, latest nvidia drivers (tried to install cuda 7 and other drivers - no result).

I set image resize in project settings and other performance stuff to minimum.
Where can be a trouble?

Thank you in advance!

Even if related to Davinci Resolve 10 i think it's still useful:

http://ilovehue.net/?p=461

Thank you, but I have read this article and applied these settings, but it did not help