The HD video was originally brought into a SD timeline. When I place it in a new project and on a HD timeline it began functioning correctly, but only for about 10 minutes. Now each command (turning a video track on and off) takes a minute or so follow through with the command. In the meantime, of course, the screen is frozen.
I've opened a new project imported the same clips on an HD timeline. I opened Windows Task Manager and all 8 cores(cpu usage) are active as I play each track as it is brought in, however, there is usually a momentary delay for each command. Tapping the space bar and the timeline begins to play, BUT only after a 5 or 10 seconds. All 8 cores are at 100%. When I tap the space bar to stop, there is a delay of up to 15- 25 seconds.
Also, when I begin to sync tracks manually, the screen freezes and then begins to cycle in and out of 'non-responding' status. At that time only 4 of the 8 cores (cpu usage) shows any activity. The cycling continues for more than 5 minutes. By that time I close the program.
videos is 1hr and 20 min.
Edit: I have changed the video card back to the original GeForce 9500 GT
>7200 RPM HD's no raid
How many and how configured?
My 3 hard drives are configured as... (WD = Western Digital)
1 - 320G WD Win7 64bit Pro and all program installs
2 - 320G WD Win7 swap file and video project files
3 - 1T WD all video files... input & output files
Search Microsoft to find out how to redirect your Windows swap file
"input output" means that I do not have 4 drives, so I read the video files from and write the output files to the same drive
Since you have 4 drives you should do your first 2 as I do, then #3 your input source files and #4 your output final files
The hardware section includes this FAQ article http://forums.adobe.com/thread/662972