When Premiere is closed I see real time performance on RAM previews (29.97fps), smooth UI interaction with and without Fast Draft enabled. When Premiere is opened I get poor fps in RAM previews, lagging UI interaction unless Fast Draft is enabled. Premiere Memory preferences are set to 6GB reserved for other apps, and Optimized rendering is for Memory. It seams that as soon as Pr takes on any processing AE's performance just dies until Pr is closed.
I've tried clearing caches in AE and in Premiere, restarts, and repair disk permissions,
Included is a realtime screen capture of what i'm experiencing, I open and close premiere twice to illustrate that it's not an isolated occurrence.
dual 2.26ghz quadcore MacPro4.1
4000 for Mac.
CUDA 4.2.10, GPU driver 18.104.22.168.
Cache drive is a 2TB RAID 0 with 250MB/sec
Media is on RAID 6 with 600+MB/sec.
Premiere Pro CS6.0.1
After Effects CS6.0.1
I tried the same thing on my MacBook Pro and there was no issue. Here's my specs:
Processor 2.4 GHz Intel Core i7
Memory 8 GB 1333 MHz DDR3
Graphics AMD Radeon HD 6770M 1024 MB
Software Mac OS X Lion 10.7.4 (11E53)
Thanks for testing. If I find a solution I will be sure to post it.