Initially was told I need to upgrade my PC:
Notes some posters had juddering and sync with long rendering times.
Had the same problem and basically was told my system was not good enough to cope with the files, including .mov files.
Have upgraded to an Intel i7, 3.2 6 core unlocked processor. 64GB ram, ssd 128gb cache on a 300gb Velociraptor and using a Zotan NVidia 680 4gb graphics card. Have 32gb ram as windows cache - and I still have the same problem!!!!!
Its not hardware - its the software, it just has to be!
The rendering of 2 layer videos and editing of same takes minutes now - it took hours on my last machine.
As soon as you layer tracks and music (not .mov files) is gets jerky! Impossible to sync and its frustrating.
Anyone out there with an answer?
Thanks, George