DR12 Studio Color Page Slow Playback

Running DR12.1, Blackmagic 2.5K footage, Timeline is 1080p. The Timeline plays back in realtime; 23.976. However, when switching to the Color Page, the playback dropped to 19 to 22 frame,
Playing around with different setting resolutions and optimization up to 1/4 isn’t help. Of course, this making impossible to watch and hear the edit properly in realtime during grading.

I never have this issue before not even running Alexa at 2K nor Red Dragon footage at 6K with the same Project and Timeline setting as the one above..

Any help would be greatly appreciated.

System:

DR12.1 Studio/ dongle
Mac Pro 3.5/6 Cores
OS: Yosemite 10.10.4
Memory: 64GB 1600MHz
GRaphic Card: (2x) NVIDIA GeFORCE GTX770 4GB
8TB (2x4) 7200RPM Internal RAID0 configuration

[Dwaine Maggart]

When you say the timeline plays back in real time, do you mean on the Edit page?

When you switch to the Color page, are you on the Windows or Tracking palette? If so, that is likely the issue. Select the Curves palette and see if that solves the issue.

Could your RAID be very fragmented?
Check the true throughput and run a disk utility like Disk Warrior.
RAW footage from that camera can be demanding.

When you say the timeline plays back in real time, do you mean on the Edit page?

Dwaine, thanks for your response.
Yes. The Edit page. Playback is fluence there.

When you switch to the Color page, are you on the Windows or Tracking palette? If so, that is likely the issue. Select the Curves palette and see if that solves the issue.

DR12.1 is playback with fluency in the Color Page too regardless what window I choose; this after fallowing some suggestions given by jdr at the bmcuser:
http://www.bmcuser.com/showthread.php?1 ... to=newpost

Could your RAID be very fragmented?
Check the true throughput and run a disk utility like Disk Warrior.
RAW footage from that camera can be demanding.

Uli, thanks so much for your response.

It wasn't a disk fragmentation causing the drop frames in the Color page. It's my rule never to delete media files from hard drives during editing or color grading, this, to avoid disk fragmentations.

Everything is running fine at the moment.