Upgraded to CS4 and video is VERY choppy.

Question

     I'll add some computer stats but honestly, I dont think they matter that much since the same system was running CS3 like a champ.
Dual Core 2 (2.4ghz e6600), 8gig DDR2 ram, Raptor 10k OS drive, 5x 320gig data drives. Nvidia 8800gts card. Vista Prem. 64bit.
I shoot on a Sony EX1 and after upgrading to CS4 I noticed an EXTREMLY slow playback on the preview. No effects added, just dragging down and simple cuts. The audio typically goes smooth though.
Any initial thoughts? or can I provide any more details to help what may be going on?

Answer 1

I found a temp fix that worked for a system a friend asked me to look at.  It is not really a valid solution but it does seem to fix the problem at least until the root cause can be found.  If you set the priority of the ImporterProcessServer to above normal, it seemed to fix the problem (at least on the system I was working on).  To do this, open task manager, right click on the process and click Set Priority -> Above Normal.
Doing this isn't really recomended as it could take cycles from more important system processes or other critical processess.  In this case, he just sets the priority up when he needs it, then back down when he is done.
In case you are wondering, the specs of the system I was working on are:
System:
Core2Duo e8400
Asus Maximus Formula Mobo
8gb DDR 800
GeForce 8800GTS 640 (latest drivers from NVidia)
1x750gb System drive
1x1.5tb Video storage
1x1.5tb Swap / Render drive
Windows 7 64 Beta build 7048
Windows Vista 64 (dual boot)
Project:
Hockey game shot at 1080 60i + some shots at 720 60p.  Each were in their own sequence.
He did mention that he still couldn't view multiple video streams without it slowing down, but at least he was able to view the normal footage without delay. Also, I performed and tested the fix only on the Windows 7 system, so I am not sure about Vista but it should help there as well.  I look forward to hearing about a true fix.
Good Luck