Here’s a screencam-based tutorial detailing and demonstrating the new performance related enhancements to Premiere Pro CS5 and identifying the relevant hardware requirements.
For those who care about such things, I created the screencam in Camtasia 7, the most recent version from TechSmith, which has some very cool new features, including the sketch callouts you see throughout the video.
Enjoy!
This screencam details the new performance related features in Adobe Creative Suite 5.