Red Epic 5K Files = Slow Playback on V9 with RedRocket?

So I'm having an issue where I can only get a max of about 17fps out of Red Epic Files (5K), in a 1920x1080 timeline in Resolve V9 (even with a redrocket, and at half rez good settings, see system config below). In V8.2.2 the files playback in realtime on Half Rez Premium with the Rocket (and redcine-x plays these back at half rez fine w/rocket on same system). Anyway else experiencing this problem???? I've had to switch back to 8.2.2 for an epic project.

note - the problem doesn't seem to apply to Red MX footage as that will play back in real time nicely in V9, just red epic. Also it seems that even if I set the footage to 1/16rez in V9, playback never comes close to 24fps, odd.

System Config:

MacPro 2.26 Nehalem 8 core
24gb RAM
Slot 1 - GUI GTX 285
Slot 2 - Cubix
Slot 3 - Decklink
Slot 4 - Rocket Raid 4322
Cubix 1 - GTX 580 3gb
Cubix 2 - GTX 580 3gb
Cubix 3 - Red Rocket
Cubix 4 - Caldigit USB 3.0 / Esata Card

Chris Hall
Colorist - Basher Films
Pasadena, CA