I did a AE cs 5.5 project in 8 bpc mode into premiere cs 6 when I'm not playing the video I see noise in the video (See photo 1) when play the video it looks good.
I also included a snapshot of my video card info which I'm using on a Z800 with 24 gig ram.
Display card info
Was this exported out of AE, or Dynamically Linked into PP?
Exported out of AE using avid DNxHD (It's a file I happen to have to test PR CS6
I've heard of issues using that codec. Try another as a test. (Or perhaps better yet, File>Dynamic Link>Import After Effects Composition...)